Aidan Miller Fantasy Stats

Philadelphia Phillies infield prospect Aidan Miller will take most of his spring training reps at shortstop and third base, according to manager Rob Thomson. He may also play some second base. However, the skipper shut down any chance of him playing left field. Miller was a first-round pick out of high school in 2023, and a meteoric rise through the minors resulted in him playing eight games at Triple-A last year. Between Double-A and Triple-A in 2025, he slashed .264/.392/.433 with 14 home runs, 59 stolen bases, a 15.6% walk rate, a 23.4% strikeout rate, and 137 wRC+. It seems like he'll probably open 2026 at Triple-A, but his minor league statistics and his impending spring training workload both indicate that he should make his MLB debut in the very near future. He's already generating buzz in fantasy baseball circles, ranking as the #40 shortstop in RotoBaller's latest draft rankings for 2026.

According to Charlotte Varnes of The Athletic, Philadelphia Phillies infield prospect Aidan Miller is not expected to break camp with the MLB roster. While Varnes noted that a 2026 MLB debut remains in play, he will likely not be on the team's Opening Day roster given the team's current infield depth. Miller is considered the team's No. 2-ranked prospect on MLB.com and overall No. 32 prospect in the sport. Miller joined the organization with the 23rd overall pick in the 2023 MLB Draft out of J.W. Mitchell HS. Miller spent the majority of the 2025 season with Double-A before finishing the season with a brief taste at Triple-A. Through 108 games at Double-A, Miller held a .259/.382/.427 line with 13 home runs and 52 stolen bases. During his brief eight-game stint at Triple-A, Miller posted a .333/.514/.519 line. Even though he is not expected to break camp with the MLB roster, he could become a top stash candidate in deeper category formats early in the season, given his five-category skill set.

Philadelphia Phillies infield prospect Aidan Miller earned an invite to spring training. Miller is considered one of the top shortstop prospects in the sport on MLB.com and is viewed as the team's No. 2 overall prospect. The 21-year-old joined Philadelphia in the opening round (27th overall) of the 2023 MLB Draft. The infielder began the 2025 campaign with Double-A Reading, where he held a .259/.382/.427 line with an .809 OPS. Miller hit 25 doubles, 13 home runs, and stole 52 bases. He then finished the season with a brief eight-game stint at Triple-A, where Miller posted a strong .333/.514/.519 line with one home run and an impressive seven stolen bases. Given that Miller has only had a brief stint in Triple-A, he will likely begin the 2026 season there. However, if he has a successful spring training, he may contend for an early 2026 MLB debut.

Philadelphia Phillies shortstop prospect Aidan Miller has seen his prospect stock rise in 2025 and could be ticketed for his MLB debut during the second half of the 2026 season. In 2025, Miller opened the season with Double-A and looked quite comfortable there, posting a solid .259/.382/.427 line with 25 doubles, 13 home runs, and 59 stolen bases. His stolen base total was a massive increase from the 23 he stole in the 2024 campaign across the lower levels of the system. This strong play earned him a brief eight-game stint with Triple-A. During this small taste, the former 27th overall pick held a .333/.514/.519 line with one home run and an eye-catching seven stolen bases. Given his elite play last summer, Miller appears ticketed to begin the season with Lehigh Valley. If he continues this trajectory, a second-half debut would be in play.

Philadelphia Phillies shortstop prospect Aidan Miller will not play in the Arizona Fall League due to "some nagging things physically," according to farm director Luke Murton. The Phillies are choosing rest for Miller after a long season that ended with him at Triple-A Lehigh Valley. Per MLB Pipeline, Miller is Philly's No. 2 prospect, behind only right-hander Andrew Painter. The 21-year-old former 27th overall pick in 2023 played for Double-A Reading and Lehigh Valley this year and hit a combined .264/.392/.433 with an .825 OPS, 14 home runs, 42 RBI, 82 runs scored, and a whopping 59 stolen bases in 116 games. He only spent eight games at Triple-A. It's unclear if Miller will stick at shortstop in the long run or eventually move to third base, but either way, he's a pure hitter with elite speed. If he shows well at Lehigh Valley early in 2026, Miller should be on track to make his big-league debut next season.

Philadelphia Phillies shortstop prospect Aidan Miller headlines a group of Phillies prospects headed to the Arizona Fall League (AFL) in October. The season begins on October 6, with Miller, Otto Kemp, and others representing the Surprise Saguaros. The 21-year-old Miller was a bit slow out of the gates this year, but finished strong, batting .361 with 15 doubles, five home runs, and 15 steals, with as many walks (25) as strikeouts (25) over his last 31 games at Double-A, before receiving a promotion to Triple-A this past Monday. The Phils' second-ranked prospect will get a chance to get some extra reps in the AFL with his sights set on a potential major league debut in 2026.

Philadelphia Phillies shortstop prospect Aidan Miller is headed to Triple-A Lehigh Valley following a productive campaign at Double-A this year. The Phils' second-ranked prospect started off slow, hitting just .217 through his first 77 games, although he still managed to hit eight home runs, draw walks at a 14.2 percent rate, and steal 37 bases during that time. However, in the last 31 games, he's hit .361 with five home runs, logged a 25:25 BB:K, and stolen 15 additional bases. In all, the 21-year-old finishes his Double-A season with a .259/.382/.427 slash line with 13 home runs and 52 steals in 108 games. The former first-round draft pick could be in line for a late-season call-up in 2026, and the 6-foot-1 slugger should already be stashed away in dynasty formats.

Philadelphia Phillies infield prospect Aidan Miller has been named Eastern League Player of the Week for the second time in August. The 20-year-old shortstop tore up Double-A pitching, batting .522 with two home runs, five doubles, and seven RBIs over the past week. Miller has been one of the hottest bats in the minors, piling up 49 stolen bases and 12 homers this season. With Triple-A within reach and September call-ups approaching, Miller is a name to stash in dynasty formats as he pushes closer to Philadelphia's long-term infield picture.

Philadelphia Phillies shortstop prospect Aidan Miller homered in the first inning Friday against Akron, later adding a walk and a double. The 21-year-old is now slashing .239/.356/.390 at Double-A, showing both his strengths and areas for growth. While his 24.6% strikeout rate highlights some contact issues, Miller continues to flash a strong power-speed profile with 10 homers and 47 steals this season. The Phillies' No. 2 prospect is expected to open 2026 at Triple-A, and a hot start there could put him on the fast track to Philadelphia before the end of next season.

Philadelphia Phillies infield prospect Aidan Miller went 2-for-4 with a double, a home run, and a stolen base during their contest against Double-A Akron on Friday evening. This was his second straight multi-hit game and second straight contest tallying a double. Over his last 16 games at Double-A Reading, the former 27th overall pick has posted an elite .338/.442/.569 slash line with nine doubles, two home runs, and nine stolen bases. Through 93 total games at Double-A this season, the 21-year-old has enjoyed a solid campaign, posting a .239/.356/.390 line, but he appears to have begun to turn the corner in the second half. Fantasy managers should continue to monitor his status, as he could be given a brief taste of Triple-A later in the season.