Seattle Mariners News

Seattle Mariners outfielder Lazaro Montes (hip) returned to his team's lineup on Tuesday, batting eighth and playing designated hitter against the Texas Rangers. Montes was sidelined by a hip injury throughout most of the weekend after crashing into the right-field wall in Seattle on Friday night. The 21-year-old made his MLB debut with the Mariners on September 1 and has logged three hits and a home run across his first 15 big-league plate appearances. Montes was having a monster year in the minors before getting the call, hitting .249 with 38 home runs, 96 RBI, 99 runs scored, and eight stolen bases across 542 plate appearances split between Double-A and Triple-A. Swing-and-miss is a major issue in his profile at the plate, but Montes holds tremendous power upside and could be a game-changer for fantasy managers down the stretch.

The Seattle Mariners are promoting top infield prospect Michael Arroyo to the major leagues prior to Sunday's game against the Athletics, according to Daniel Kramer of MLB.com. Arroyo ranked as the Mariners' No. 3 prospect in the latest MLB Pipeline farm system rankings. He was originally signed as an international free agent out of Colombia in 2022. He was promoted from Double-A to Triple-A in the middle of the 2026 season, slashing .283/.359/.471 with 18 home runs, 81 RBI, 17 steals, and 117 wRC+ between the two affiliates. He also racked up an 8.1% walk rate and a 16.4% strikeout rate in the minors. Arroyo played the left side of the infield early in his minor league career, but he has only played second base and left field in 2026. He'll make his MLB debut on Sunday afternoon, batting eighth and playing second base.

Seattle Mariners starting pitcher Kade Anderson was called up to make his MLB debut two weeks ago. His three starts since the call-up haven't been otherworldly, but he still has the strikeout upside necessary to make him an impactful starting pitcher in fantasy baseball for the final stretch of the season. Anderson has a 5.40 ERA through his three starts, but the 3.17 FIP doesn't look quite as bad. The ball-in-play metrics are solid, but we'd like to see him harness his strikeout, walk, and home run rates over a larger sample size. His 6.60 K/9 rate in the majors is essentially half of his rate from the minors this year, and his 4.20 BB/9 and 1.80 HR/9 rates are both key reasons why his ERA is so high. Getting called up midseason could be the main reason why Anderson has been a little shaky in the majors, and we have no concerns about his ability to produce long-term. Meanwhile, in the short-term, there's still a window for him to turn things around if he can attack the strike zone and miss more bats. He's an intriguing stash in September because if he makes those corrections, he'll have a huge fantasy baseball impact. He currently ranks as the #30 starter in RotoBaller's latest rest-of-season fantasy baseball rankings.

Seattle Mariners outfield prospect Lazaro Montes (hip) is absent from the starting lineup on Saturday against the division-rival Athletics at T-Mobile Park after crashing into the outfield wall and injuring his hip on Friday night, according to MLB.com. Dominic Canzone is starting in right field and is batting in the two-hole against A's left-hander Jeffrey Springs. Montes is considered day-to-day with soreness in his left hip and appears to have avoided a significant injury, so the young outfielder could be back in action as early as Sunday's series finale against the A's. The Mariners' No. 5 prospect, per MLB Pipeline, put up big numbers in 123 minor-league games between Double-A Arkansas and Triple-A Tacoma this year before his call-up recently, slashing .249/.369/.558 with a .928 OPS, 38 home runs, 96 RBI, 99 runs scored, and eight stolen bases in 542 plate appearances. For Montes' raw power alone, he is a worthy fantasy baseball stash in deep-mixed leagues. In his first three MLB games, the 21-year-old Cuban outfielder has gone 3-for-11 with a homer, three RBI, two runs, a walk, and four strikeouts. Montes is rostered in only 6% of Yahoo leagues.

Seattle Mariners second base/outfield prospect Michael Arroyo already has six RBI in his first four September games at Triple-A Tacoma and is continuing to show why he is one of the top prospects in the Mariners system. The Mariners No. 3 overall prospect, Arroyo is a well-rounded player with a 55-grade hit tool and 55-grade power with 50-grade speed. Between two minor league levels this season, Arroyo has a combined 18 homers and 17 stolen bases with a .286 batting average and looks like a consistent, five-category performer. As someone who can play second base or be shifted to the outfield, Arroyo has some versatility to his game. He is looking like he will be a plus fantasy contributor when he is called up to the majors, and he looks like someone the Mariners could use with his all-around game and his positive versatility.

Seattle Mariners outfield prospect Lazaro Montes (hip) exited Friday night's game early against the division-rival Athletics with soreness in his left hip, according to the team. In just his third MLB game, Montes left hobbled after crashing into the outfield wall while attempting a catch. Until we know the severity of the 21-year-old's injury, we will consider him day-to-day. Before being replaced in right field by Taylor Ward, Montes went 0-for-2 at the plate. In his first two games for the M's, the team's No. 5 prospect per MLB Pipeline went 3-for-9 with a home run, three RBI, and two runs scored. Seattle recently called up the 21-year-old Cuban outfielder in hopes that he would give the team a shot in the arm as they try to stay in the playoff race in the American League down the stretch. In 123 games (542 plate appearances) in the minors this year with Double-A Arkansas and Triple-A Tacoma, Montes hit .249/.369/.558 with a .928 OPS, 38 home runs, 96 RBI, 99 runs scored, and eight stolen bases, so he can certainly do serious damage at the dish when he is on. Because he sells out for lift and power most of the time, fantasy managers will have to put up with plenty of strikeouts. But his 6-foot-5, 250-pound frame can produce high-end power. UPDATE: MLB.com's Luke Olson reports that Montes is day-to-day.

According to Ryan Divish, Seattle Mariners relief pitcher Matt Brash (lat) will be shut down from throwing for the next eight weeks. The Mariners are doing this after a recent MRI revealed more inflammation in his lat. Brash was ramping up towards a return in late August, but unfortunately, he suffered a setback. When healthy, Brash has been a stud, but keeping him on the mound has been extremely difficult for the Mariners. He'll finish the season with a 0.54 ERA, 0.84 WHIP, and a 15/6 K/BB ratio across 20 appearances. The expectation is that the 28-year-old will be ready to go for the 2027 season.

Seattle Mariners infield/outfield prospect Michael Arroyo cooled after a hot start to his Triple-A campaign, but is heating up again for Tacoma, going 8-for-26 (.308) with a double, a triple, a home run, one stolen base, and a 3:4 BB:K over his last seven games for the Rainiers. It brings the slash line to .271/.349/.481 for the Mariners' top offensive prospect, with eight home runs and three steals in 44 games since being promoted to Triple-A in early July (18 home runs, 16 steals in 109 games including Double-A). The jump to the higher level has not fazed him, with virtually identical strikeout (16.7 percent) and walk rates (8.1 percent), along with a 10-point improvement in OPS (.830). The Mariners have aggressively promoted other top prospects this season, with Colt Emerson, Kade Anderson, and Lazaro Montes all making their debuts in 2026, and Arroyo could be next in line. With solid hit, power, and speed tools, the 21-year-old possesses a solid all-around skill set that could make him a sneaky fantasy option down the stretch if he were to get regular at-bats, making him a stash-worthy option in deeper 12+ team leagues.

Seattle Mariners right-hander Bryce Miller is set to return to the team's starting rotation following right-hander Emerson Hancock's (groin) placement on the 15-day injured list, per Daniel Kramer of MLB.com. Mariners manager Dan Wilson said on Friday that Miller was temporarily being moved into a bullpen role. However, the injury to Hancock will move Miller back into the rotation before he made a single appearance out of the pen. Across 94 innings on the year, Miller has recorded a 4-8 record with a 4.12 ERA, 1.09 WHIP, and 92 strikeouts. While the 28-year-old's overall numbers are respectable, he struggled to a 9.00 ERA across 20 innings in August. Still, Miller has posted a solid 24.6% strikeout rate while walking just 6.6% of the batters he's faced this season. His next start is likely to come on Wednesday at Fenway Park against the Boston Red Sox.

Seattle Mariners top outfield prospect Lazaro Montes is being called up to the majors, according to Francys Romero of Beisbol FR. The talented outfielder signed with the Mariners as an international free agent out of Cuba in 2022 and has quickly developed within the organization's farm system. Up until this point, Montes had split his 2026 season between Double-A and Triple-A. Through 43 games at the Triple-A level, he was slashing .267/.359/.564 with 13 home runs, an 11.6% walk rate, a 31.3% strikeout rate, and 125 wRC+. Strikeouts are evidently a concern with the 21-year-old, but he makes up for it with incredible power, slugging 38 total homers in the minors this year. There's a strong chance that he could be in the lineup for his MLB debut tomorrow against the Boston Red Sox. Regardless of whether he plays on Monday, he should earn consistent playing time in the thick of the playoff race, as the Mariners are five games back in the AL West.

According to Daniel Kramer, Seattle Mariners starting pitcher Bryce Miller is temporarily being moved to the bullpen. Mariners manager Dan Wilson confirmed the news on Friday that the struggling right-hander will shift to the pen for now. Over his last eight starts, Miller is 0-6 with a horrendous 7.19 ERA. It doesn't sound like Miller is fully healthy right now, so they might move him to the Injured List if he continues to struggle. The Mariners will go with a traditional five-man rotation with Miller getting the boot. Miller will likely pitch in low-leverage spots, which won't result in much fantasy value.

Seattle Mariners outfield prospect Lazaro Montes is still hitting with power in the minor leagues, with nine homers and 19 RBI in August with Triple-A Tacoma. This season, between Double-A Arkansas and Triple-A Tacoma, Montes has combined to hit .248 with 37 homers and 93 RBI with 96 runs scored. The power-hitting skills are elite for Montes, the No. 5 overall prospect for the Mariners. He is blessed with 65-grade power but just a 45-grade hit tool. So he will need to improve his overall batting skills before he is able to earn a promotion to the big leagues. But the Mariners could use the power that he provides, making him a tempting call-up at the end of this season. Fantasy managers will want to monitor closely how the Mariners use Montes as this season winds down.

Seattle Mariners new top middle-infield prospect Michael Arroyo is an accomplished infielder who could make a difference as a late-season call-up to the Mariners. The 21-year-old has hit well since his promotion to Triple-A Tacoma. In 41 games with Tacoma, Arroyo has eight homers and 35 RBI while hitting .271 with 31 runs scored. At Double-A Arkansas this season, Arroyo hit 10 homers and drove in 40 runs while hitting .287. The right-handed hitter is the No. 3 prospect in the Mariners system behind pitchers Kade Anderson and Ryan Sloan. Arroyo was signed out of Colombia and has a 55-grade hit tool and 55-grade power with 50-grade speed. Arroyo could be a nice addition to fantasy teams down the stretch and could provide five-category contributions to fantasy rosters.

The Seattle Mariners called up their top pitching prospect last weekend in left-hander Kade Anderson, and he nearly recorded a quality start in his major-league debut against the Chicago Cubs, allowing three runs (two earned) on five hits (two homers) while walking two and striking out five in 5 2/3 innings pitched last Saturday. The 22-year-old southpaw, who is ranked as Seattle's top overall prospect at MLB Pipeline, threw four shutout innings last Saturday before allowing two solo home runs in the sixth frame. MLB Pipeline also has Anderson ranked as the top left-handed pitching prospect in all of baseball after the former third overall pick from LSU went 10-1 with a 1.06 ERA, 0.64 WHIP, and 135:13 K:BB in 93 1/3 innings across 18 starts at Double-A Arkansas this year before getting the call to the Show. Anderson, who is already rostered in nearly 60% of Yahoo leagues, can absolutely be a difference-maker for fantasy pitching staffs in the final month of the regular season in September, and he will have a plus second matchup as a member of the M's this weekend in Toronto against the Blue Jays. Scoop him up now if you need starting pitching help.

Seattle Mariners outfielder Julio Rodriguez has not been able to put it together at the plate this season. Fantasy managers have stayed hopeful that Rodriguez would figure it out, but it hasn't happened yet. Over the last two weeks, Rodriguez is 10-for-57 with one home run, four RBI, and two stolen bases. The three-time All-Star still has 20 homers and 17 steals, which is good, but fantasy managers expect more out of Rodriguez. The 25-year-old still has a month left in the regular season to turn it around and help his team make the postseason. At this point, fantasy managers can't really do anything but stick with Rodriguez and hope things turn around.

The Seattle Mariners reinstated infielder J.P. Crawford (wrist) from the 10-day injured list on Tuesday, optioning infielder Leo Rivas to Triple-A Tacoma as the corresponding move. Crawford had been sidelined since late July due to left wrist inflammation. Across 364 plate appearances on the year, the 31-year-old is hitting .212/.330/.345 with 10 home runs, 30 RBI, 38 runs scored, and one stolen base. Crawford's 6.4% barrel rate and 35.3% hard-hit rate are both subpar, but his stellar 13.7% walk rate provides him with a relatively stable floor at the plate. With Mariners infielders Brendan Donovan (concussion) and Colt Emerson (wrist) both on the injured list, Crawford should also be in line for everyday playing time on the left side of the infield. He's starting at third base and batting eighth on Tuesday night against the Philadelphia Phillies.

It has been a rough 2026 season for Seattle Mariners catcher Cal Raleigh, but he had a bright spot in Monday night's 9-2 win over the visiting Philadelphia Phillies, going 3-for-3 at the plate with three home runs, four RBI and a walk. It was the 29-year-old left-handed slugger's first three-homer performance of his career and his first multi-homer showing of the season. Despite the monster game at T-Mobile Park, the Big Dumper is still slashing only .167/.282/.336 with a .618 OPS, 17 home runs, 51 RBI, 31 runs scored, two stolen bases, and a 30.9% strikeout rate in his 408 plate appearances in 2026. The poor season comes after Raleigh was a first-time All-Star and finished second in the American League MVP voting just last year after he finished with a league-high 60 home runs and 125 RBI in 159 regular-season games played. Raleigh can still make a power impact for fantasy managers down the stretch this year, but he almost certainly will finish shy of the 30-homer mark for the first time since his first full year in the league in 2022.

Seattle Mariners right-hander Bryan Woo (shoulder) is "100% confident" that he can make his scheduled start on Wednesday at home against the Philadelphia Phillies, according to The Seattle Times' Adam Jude. Woo had his last start on Aug. 16 cut short due to soreness in his right shoulder, and the Mariners skipped his last scheduled start over the weekend against the Chicago Cubs. The 26-year-old threw a successful bullpen session on Sunday, though, and thinks he will be cleared to toe the rubber this Wednesday. Fantasy managers will want to be cautious with his start this week while coming off an injury, although he will be on extra rest. Woo allowed 10 earned runs with four walks and 13 strikeouts in 10 innings in his final two starts of July against the Texas Rangers and Los Angeles Dodgers, but he's rebounded in three starts in August against the Detroit Tigers, New York Yankees, and Astros, allowing just two earned runs with three walks and 15 strikeouts in 18 innings pitched. He is 9-8 in 2026 with a 4.10 ERA (3.29 FIP) and 1.08 WHIP with 137 strikeouts and only 29 walks in 138 1/3 innings across his 24 starts on the year in his fourth year in the majors.

Seattle Mariners rookie infielder Colt Emerson (wrist) is scheduled to have season-ending wrist surgery on Wednesday, according to Adam Jude of The Seattle Times. There was a lot of excitement around Emerson, one of the team's top overall prospects, making his major-league debut in 2026, but it did not last long. The 21-year-old left-handed-hitting infielder struggled with big-league pitching in his first 69 games and 241 plate appearances, slashing .190/.246/.335 with a .581 OPS, eight home runs, six doubles, a triple, 23 RBI, 24 runs scored, three stolen bases, 15 walks, and 83 strikeouts. It was not what Emerson, his fantasy managers, or the Mariners expected, but the good news is that the young infielder is expected to be ready for the start of spring training early in 2027. Barring a setback with his wrist injury, Emerson is still in line as the club's starting shortstop over the long term, so fantasy managers in dynasty/keeper leagues should be looking to buy low on the shortstop prospect this winter. Brock Rodden is starting at the 6 on Monday for the M's, but veteran J.P. Crawford (wrist) could come off the injured list as early as Tuesday to regain starting shortstop duties.

Seattle Mariners right-hander Bryce Miller became the first pitcher since George Van Haltren of the 1890 Brooklyn Wonders to lose consecutive starts by at least 17 runs, according to ESPN Insights. In the Mariners' 19-2 loss to the Chicago Cubs on Sunday, Miller allowed six earned runs on two hits (two homers) while walking seven and striking out five in 4 1/3 innings for his eighth loss of the year. In his previous outing, a 22-0 shutout loss to the Milwaukee Brewers, he gave up six runs (five earned) on seven hits (one homer) while walking two and striking out three in 4 2/3 innings. The Seattle Times' Adam Jude reports that Miller admitted after Sunday's loss that he has dealt with a minor right-lat injury since his July 24 start against the division-rival Texas Rangers. He allowed five earned runs to Texas on that day and has a 7.92 ERA with 15 walks and 21 strikeouts in 30 2/3 innings in his last six starts for Seattle. Fantasy managers should be avoiding Miller in his next scheduled outing this Sunday against the Toronto Blue Jays, and he could be relegated to the bullpen once Bryan Woo returns from his shoulder injury.