2025 Stats
W-L
0-0
ERA
12.27
WHIP
2.73
K
3
SV
0
Rest-of-Season Projections
Signed a one-year, $770,000 contract with the Nationals in November of 2024.
Back from injured list
The Nationals reinstated Thompson (elbow) from the injured list Saturday.
Analysis
Thompson has spent the entire season working his way back from a Tommy John procedure he underwent in March 2024. He gave up six earned runs over eight frames during his rehab assignment, though he threw 1.1 scoreless innings at Triple-A Rochester. Now fully healthy, he'll replace Zach Brzykcy in Washington's bullpen and take Derek Law's (forearm) place on the 40-man.
Thompson has spent the entire season working his way back from a Tommy John procedure he underwent in March 2024. He gave up six earned runs over eight frames during his rehab assignment, though he threw 1.1 scoreless innings at Triple-A Rochester. Now fully healthy, he'll replace Zach Brzykcy in Washington's bullpen and take Derek Law's (forearm) place on the 40-man.
Pitching Stats
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2025 MLB Game Log
2025
2024
2023
2022
2021
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
16
Last 10 Games
16
Last 5 Games
17
How many pitches does Mason Thompson generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Mason Thompson generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-6%
BAA vs RHP
2025
-29%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .310 | 19 | 19 | 26 | 2 | |||
| Since 2023vs Right | .292 | 28 | 7 | 42 | 2 | |||
| 2025vs Left | .286 | 1 | 4 | 2 | 0 | |||
| 2025vs Right | .400 | 2 | 0 | 4 | 0 | |||
| 2024vs Left | 0 | 0 | 0 | 0 | 0 | |||
| 2024vs Right | 0 | 0 | 0 | 0 | 0 | |||
| 2023vs Left | .312 | 18 | 15 | 24 | 2 | |||
| 2023vs Right | .284 | 26 | 7 | 38 | 2 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-60%
ERA at Home
2025
-100%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.20 | 1.30 | 25.1 | 5.3 | 4.6 | ||||
| Since 2023Away | 8.07 | 1.89 | 32.1 | 8.9 | 3.6 | ||||
| 2025Home | 0.00 | 2.25 | 1.1 | 6.8 | 13.5 | ||||
| 2025Away | 19.29 | 3.00 | 2.1 | 7.7 | 7.7 | ||||
| 2024Home | 0 | 0 | 0 | 0 | 0 | ||||
| 2024Away | 0 | 0 | 0 | 0 | 0 | ||||
| 2023Home | 3.38 | 1.25 | 24.0 | 5.3 | 4.1 | ||||
| 2023Away | 7.20 | 1.80 | 30.0 | 9.0 | 3.3 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Mason Thompson compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
0.75K/9
7.4BB/9
9.8HR/9
0.0Fastball
94.6 mphERA
12.27WHIP
2.73BABIP
.450GB/FB
2.33Left On Base
50.0%Exit Velocity
81.8 mphBarrels/BBE
5.0%Spin Rate
2159 rpmBalls Hit 95+ MPH
25.0%Swinging Strike
8.5%Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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2017 Fantasy Outlook
Tommy John surgery in his junior year of high school dropped Thompson to the third round of the 2016 first-year player draft, when the Padres took a gamble on the 19-year-old and swayed him from a Texas commitment with $1.75 million. Thompson has some work to do to fill out his 6-foot-7, 186-pound frame, but he has the stuff to succeed if he can do so. He posts good velocity and has some decent backup pitches, which he showed off in 12 innings for the Padres' rookie league team in the Arizona League. Thompson struck out 12 batters in his five starts, allowing just eight hits en route to a 2.25 ERA and 1.08 WHIP. He'll begin next season in a low minor league level, but the Padres will have high hopes for his success if he can stay healthy and begin to add more strength.
More Fantasy News
Cleared for rehab assignment
Thompson (elbow) will shift his rehab assignment with Double-A Harrisburg on Tuesday, Andrew Golden of The Washington Post reports.
Analysis
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Close to rehab assignment
Nationals manager Dave Martinez said Friday that Thompson (elbow) will make one more outing in the Florida Complex League before embarking on a rehab assignment, Spencer Nusbaum of The Washington Post reports.
Analysis
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Goes on 60-day injured list
The Nationals placed Thompson (elbow) on the 60-day injured list Wednesday.
Analysis
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Chance to be ready for Opening Day
Nationals manager Dave Martinez said Friday that Thompson (elbow) has a chance to be ready in time for Opening Day, Spencer Nusbaum of The Washington Post reports.
Analysis
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Agrees to deal with Nats
Thompson (elbow) agreed to a one-year contract with the Nationals on Thursday to avoid arbitration, Mark Zuckerman of MASNSports.com reports.
Analysis
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Latest Fantasy Rumors
Out of high-leverage mix?
Thompson delivered a scoreless inning during Tuesday's 7-4 loss to San Diego, but Mark Zuckerman of MASNSports.com speculated the right-hander is no longer a trusted high-leverage option for manager Dave Martinez.
Analysis
Thompson's entered Tuesday's contest having been scored upon in each of his previous five outings, so it's not a major surprise he's fallen out of favor a bit. The 25-year-old had a 1.80 ERA, 0.70 WHIP and 19:1 K:BB across his first 20 innings of the season, and a return to that form could see him once again become a high-leverage option, though he's unlikely to be in the mix for saves without multiple injuries within the Nationals bullpen.
Thompson's entered Tuesday's contest having been scored upon in each of his previous five outings, so it's not a major surprise he's fallen out of favor a bit. The 25-year-old had a 1.80 ERA, 0.70 WHIP and 19:1 K:BB across his first 20 innings of the season, and a return to that form could see him once again become a high-leverage option, though he's unlikely to be in the mix for saves without multiple injuries within the Nationals bullpen.