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Mason Thompson Fantasy Stats

Background banner image for player info Mason Thompson

Relief Pitcher

Healthy
Height / Weight 6'6"  /  241 lbs.
Date of Birth (Age) Feb 20, 1998 (27)
Experience 4 seasons
College None

2025 Rankings

Preseason RP296
Final RP433

Season Stats

SEASON TEAM POS GP FPTS/G GS W L SV IP ERA WHIP H R ER HR BB SO AVG
2021WSHSP311.8013024.24.011.90532151141523.311
2022WSHSP242.3011124.22.921.13519882915.211
2023WSHRP502.1044154.05.501.55662353342244.282
2025WSHRP150.3011010.211.812.62516161411211.333
Career 120 1.9 0 7 9 2 114.0 5.21 1.640 129 74 66 11 58 93 .280

Game Log

TEAM OPP POS FPTS GS W L SV IP H R ER HR BB SO AVG WHIP
Jul 6, 2025 WSHBOSRP2.300000.2100011.3333.000
Jul 8, 2025 WSHSTLRP3.600001.0100001.2501.000
Jul 10, 2025 WSHSTLRP-12.200000.1455010.80015.000
Jul 13, 2025 WSHMILRP3.600001.0000011.0001.000
Jul 18, 2025 WSHSDRP0.900000.2000010.0001.500
Jul 21, 2025 WSHCINRP-2.500000.1011020.0006.000
Aug 30, 2025 WSHTBRP4.200001.0000001.0000.000
Sep 2, 2025 WSHMIARP0.000000.0000000.0000.000
Sep 3, 2025 WSHMIARP3.000001.0110011.2502.000
Sep 7, 2025 WSHCHCRP5.001001.0211101.4002.000
Sep 10, 2025 WSHMIARP0.100000.1100000.5003.000
Sep 11, 2025 WSHMIARP3.600001.0100001.2501.000
Sep 14, 2025 WSHPITRP3.600001.0000011.0001.000
Sep 16, 2025 WSHATLRP-7.700100.1354011.75012.000
Sep 19, 2025 WSHNYMRP-2.800001.0233032.4005.000

Mason Thompson News

Mason Thompson  • RP  •  Nationals

Mason Thompson Returns from 60-Day Injured List

Washington Nationals right-handed pitcher Mason Thompson (elbow) was activated from the 60-day injured list on Saturday. In a corresponding move, the Nationals optioned right-handed pitcher Zach Brzykcy to Triple-A Rochester and shifted right-handed pitcher Derek Law to the 60-day injured list. Thompson has been sidelined since undergoing Tommy John surgery during the 2024 campaign. He participated in a rehab assignment, logging eight innings across time in the Florida Complex League, as well as with Double-A and Triple-A. In 2023, Thompson logged 54 innings out of the bullpen and posted a 5.50 ERA with a 1.56 WHIP. However, in 2022, Thompson was quite effective, posting a 2.92 ERA with a 1.14 WHIP. Fantasy managers should expect Thompson to have a low-average role in the bullpen as he begins to increase his workload.
Jul 5   
Mason Thompson  • RP  •  Nationals

Mason Thompson to Begin Rehab Assignment on Tuesday

Washington Nationals manager Dave Martinez said that right-hander Mason Thompson (elbow) will start a minor-league rehab assignment on Tuesday with Double-A Harrisburg. Thompson pitched in the rookie-level Florida Complex League on Saturday but will officially begin his rehab assignment this week as he continues his lengthy recovery from Tommy John surgery in March of 202. Barring a setback in the minors, it's possible that the 27-year-old will be ready to return to the Nats' bullpen early in the second half of the season. In 2022 and 2023 in D.C., Thompson posted a 4.69 ERA (4.07 FIP) with a 1.42 WHIP, two saves, 59 strikeouts and 31 walks in 78 2/3 innings over 75 outings in relief. The former third-rounder by the San Diego Padres will remain off the fantasy radar whenever he makes his 2025 season debut.
Jun 17   
Mason Thompson  • RP  •  Nationals

Mason Thompson Placed On 60-Day Injured List

The Washington Nationals placed right-handed pitcher Mason Thompson (elbow) on the 60-day injured list. This transaction opened a roster spot for right-handed pitcher Lucas Sims, who the team signed earlier on Wednesday. Earlier in the offseason, manager Dave Martinez expressed optimism about the right-hander, but Thompson was unable to progress enough. As a result, fantasy managers should not expect him to return to the mound until late May. Thompson is still recovering from the Tommy John surgery he underwent in March 2024. During the 2023 campaign, Thompson posted a 5.50 ERA and a 1.56 WHIP across 54 innings. He tallied just 44 punchouts. When healthy, fantasy managers should expect Thompson to have a low-leverage role in the Washington bullpen.
Feb 20   
Mason Thompson  • RP  •  Nationals

Mason Thompson Could Be Ready For Opening Day

According to Spencer Nusbaum of the Washington Post, Nationals right-handed pitcher Mason Thompson (elbow) could be ready for Opening Day. The 26-year-old underwent Tommy John surgery last March but could be able to ramp up in time due to him being a relief pitcher. However, Thompson has yet to throw off a mound. Fantasy managers should continue to monitor his status during spring training. During the 2023 season, Thompson logged 54 innings of MLB action with a 5.50 ERA and a 1.46 WHIP. He tallied punchouts out a low 18.3 percent strikeout rate and held a high 9.2 percent walk rate. However, he generated ground balls at a strong 50.6 percent rate, placing him in the 84th percentile among qualified pitchers that season. If he were to be cleared for action, he would likely contend for a spot in the Washington bullpen.
Feb 15   
Mason Thompson  • RP  •  Nationals

Nationals Sign Mason Thompson To A One-Year Deal

The Washington Nationals have signed pitcher Mason Thompson to a one-year deal. The 26-year-old missed the entire 2024 season after he underwent Tommy John surgery and it is presumed that he'll miss at least some portion of the beginning of 2025 as well. Once he returns, the righty will help the Nats out of the bullpen. When Thompson last played in 2023, the former third-round draft pick pitched to a 5.50 ERA, 1.56 WHIP, and a 9.2% K-BB% in 51 appearances (54 IP). Unless he finds himself in some high-leverage role, the 6-foot-6 hurler will be off the fantasy radar until further notice.
Nov 22, 2024   
Mason Thompson  • RP  •  Nationals

Mason Thompson To Be Re-Evaluated This Week

Washington Nationals right-hander Mason Thompson (elbow) is set to be re-examined by team doctors this week after being shut down the last two weeks of camp with a sore elbow. Thompson had Tommy John surgery nine years ago as a junior in high school. He's avoided major injuries since then, but he did miss three months due to a right-biceps strain in 2022. Manager Dave Martinez admitted he's "a little concerned." Thompson was dominant at times out of Washington's bullpen, but he wasn't guaranteed a spot on this year's Opening Day roster, so his elbow injury is going to make it even tougher for him to earn a spot. He struggled through most of the second half in 2023 and finished with a 5.50 ERA and 1.56 WHIP in 51 games.
Feb 26, 2024   
Mason Thompson  • RP  •  Nationals

Mason Thompson Shut Down At Least Two Weeks

Washington Nationals right-hander Mason Thompson (elbow) has been shut down for at least two weeks with an elbow issue that he suffered over the winter, according to general manager Mike Rizzo and manager Dave Martinez. Even though Thompson will require less time to get ready because he's a reliever, this news still puts his availability for Opening Day in question. In his second full year with the Nats in 2023, he went 4-4 with a career-worst 5.50 ERA (4.03 FIP) and 1.56 WHIP with his second career save, 22 walks and a career-high 44 strikeouts in 54 relief innings. Thompson has a career 4.53 ERA and 1.54 WHIP with 82 strikeouts in 103 1/3 relief innings over his three major-league seasons and won't be a roster lock, even if he's healthy.
Feb 14, 2024   
Mason Thompson  • RP  •  Nationals

Mason Thompson Picks Up Tuesday's Save

Washington Nationals right-hander Mason Thompson was called on for the last three innings of work in Tuesday's 5-0 win over the New York Mets. He struck out four and gave up one hit to secure his first save of the season and second of his career. Thompson owns a 0.96 ERA, 0.59 WHIP, and 26.2% strikeout rate across 18.2 innings. Despite the 25-year-old's strong numbers, he hasn't been a factor in many high-leverage situations, with just one hold to his name. With Kyle Finnegan and Carl Edwards Jr. on the roster, it'll be hard for Thompson to get a look as a closer, but if he keeps dominating, he should start racking up more holds.
Apr 26, 2023   
Mason Thompson  • RP  •  Nationals

Mason Thompson Optioned To Triple-A

Washington Nationals pitcher Mason Thompson was optioned to Triple-A Rochester on Wednesday. He was sent down to the minors to open a roster spot for newly claimed Jake McGee. Thompson owned a 1.13 ERA, 1.00 WHIP, and seven strikeouts over eight innings in 2022. The 24-year-old could get the call to the big leagues when rosters expand in September. McGee has a 7.00 ERA and 1.52 WHIP with 15 strikeouts over 27 innings in 30 appearances with the Giants and Brewers in 2022. The 36-year-old is expected to serve in a middle-relief role for the Nationals and won't have much fantasy value forward.
Aug 11, 2022   
Mason Thompson  • RP  •  Nationals

Mason Thompson Placed On Injured List

The Washington Nationals placed right-hander Mason Thompson (biceps) on the 10-day injured list on Sunday with a right biceps strain and recalled reliever Hunter Harvey from Triple-A Rochester in a corresponding move. Thompson was injured during his outing on Saturday against the New York Mets. The 24-year-old has tossed one scoreless inning so far this year, allowing two walks while striking out three. Harvey will serve in a middle-relief role for the Nationals and won't have any fantasy value. The 27-year-old right-hander has never been able to get on track due to injuries, but he does have a decent 3.42 career ERA with 23 strikeouts in 23 2/3 big-league innings.
Apr 10, 2022   
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