Mason Thompson

Pitcher · Career Stats, Bio & Records (2021-2025)

Mason Thompson is a pitcher who has played in Major League Baseball since 2021 for the San Diego Padres and the Washington Nationals, a span of 5 seasons. Across 120 career appearances, he has gone 7-9 with a 5.21 ERA and 93 strikeouts.

W (Wins):
Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
ERA (Earned Run Average):
Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
SO (Strikeouts):
For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
WHIP (Walks and Hits per Inning Pitched):
Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.

Data updated

Active Player
W–L 7–9
ERA 5.21
WHIP 1.64
SO 93
Pitcher PIV thru 2025 -897.9
Position
Pitcher
Bats / Throws
R / R
Height / Weight
6'6" / 236 lb
Born
2/20/1998 in Round Rock, TX, USA
MLB Debut
2021-06-22

Full name: Mason Lane Thompson

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Career Pitching Statistics

Mason Thompson — Career Pitching Statistics
W L G GS CG SHO SV IP H ER HR BB SO ERA Pitcher PIV
7 9 120 0 0 0 2 114.0 129 66 11 58 93 5.21 -897.9

Career ERA 5.21 vs. league average 4.18 across their career seasons — 24.6% worse than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Mason Thompson — Season-by-Season Pitching
Year Team Lg W L G GS CG SHO SV IP H ER BB SO ERA Lg ERA Pitcher PIV
2021 SDN NL 0 0 4 0 0 0 0 3.0 4 1 1 2 3.00 — 0.0
2021 WAS NL 1 3 27 0 0 0 0 21.2 28 10 14 21 4.15 4.27 (+3%) -781.6
2022 WAS NL 1 1 24 0 0 0 1 24.2 19 8 9 15 2.92 3.97 (+26%) -122.2
2023 WAS NL 4 4 51 0 0 0 1 54.0 62 33 22 44 5.50 4.33 (-27%) 408.0
2025 WAS NL 1 1 14 0 0 0 0 10.2 16 14 12 11 11.81 4.16 (-184%) -402.1
Career · 5 seasons 7 9 120 0 0 0 2 114.0 129 66 58 93 5.21 — -898

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Career Batting Statistics

Mason Thompson — Career Batting Statistics
G AB R H 2B 3B HR RBI SB BB SO AVG OBP SLG OPS PIV
120 0 0 0 0 0 0 0 0 0 0 .000 .000 .000 .000 0

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Mason Thompson — Season-by-Season Batting
Year Team Lg G AB R H 2B 3B HR RBI SB BB SO AVG Lg AVG Lg OBP Lg SLG Lg OPS PIV
2021 SDN NL 4 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2021 WAS NL 27 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2022 WAS NL 24 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2023 WAS NL 51 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2025 WAS NL 14 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
Career · 5 seasons 120 0 0 0 0 0 0 0 0 0 0 — — — — — 0

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Game Log & Splits

View full game log (240 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

Mason Thompson — Batting — Home / Away
SplitGABRHHRRBIAVG
Home5700000—
Away6300000—

Pitching — Home / Away

Mason Thompson — Pitching — Home / Away
SplitGIPHERBBSOERA
Home5751.0472535324.41
Away6363.0824123615.86

Last 10 Games — Pitching

Mason Thompson — Last 10 Games — Pitching
DateTmOppDecIPHRERBBSOHR
2025-09-19 WASNYN — 1.0233320
2025-09-16 WASATL L 0.1354110
2025-09-14 WASPIT — 1.0000110
2025-09-11 WASMIA — 1.0100010
2025-09-10 WASMIA — 0.1100000
2025-09-07 WASCHC W 1.0211011
2025-09-03 WASMIA — 1.0110110
2025-08-30 WASTBR — 1.0000010
2025-07-21 WASCIN — 0.1011200
2025-07-18 WASSDP — 0.2000100

Fielding Statistics

Career Fielding Totals by Position

Mason Thompson — Career Fielding Totals by Position
Position G GS PO A E DP
P 120 0 8 11 2 2

Season-by-Season Fielding

Mason Thompson — Season-by-Season Fielding
Year Team Pos G GS PO A E DP
2021 SDN P 4 0 0 0 1 0
2021 WAS P 27 0 0 1 1 0
2022 WAS P 24 0 5 1 0 0
2023 WAS P 51 0 3 9 0 2
2025 WAS P 14 0 0 0 0 0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Mason Thompson — Career Games by Position
Position Games
Pitcher 120

Mason Thompson: the record in brief

Mason Thompson made a major league debut on June 22, 2021 and is still active, so the totals on this page keep changing. The season rows list, in order, the San Diego Padres (2021) and the Washington Nationals (2021 through 2025). Thompson played primarily as a pitcher and batted and threw right-handed. Born on February 20, 1998, in Round Rock, TX, USA, Thompson was listed at 6-foot-6 and 236 pounds. Mason Thompson was the playing name; the full given name is Mason Lane.

Thompson has gone 7-9 with a 5.21 ERA in 120 games, 0 of them starts. The same table counts 93 strikeouts. The league ERA over Thompson's seasons was 4.18, so the 5.21 figure ran 24.6% worse than average. Among the heaviest workloads, the lowest ERA was 5.50 in 2023, when the league's was 4.33.

The position breakdown shows 120 games, all at pitcher. The fielding table credits Thompson with 8 putouts, 11 assists and 2 errors on the mound.

Thompson's game-by-game log, linked below the splits, holds 240 games from Retrosheet.

Frequently Asked Questions about Mason Thompson

What years did Mason Thompson play?
Mason Thompson played in Major League Baseball from 2021 to 2025.
Was Mason Thompson a pitcher?
Yes. Mason Thompson pitched in the major leagues, recording 7 wins and 93 strikeouts.
What was Mason Thompson's career ERA?
Mason Thompson finished with a 5.21 career ERA, going 7-9 with 93 strikeouts.
How many strikeouts did Mason Thompson have?
Mason Thompson recorded 93 career strikeouts.
Is Mason Thompson in the Hall of Fame?
No. Mason Thompson has not been inducted into the National Baseball Hall of Fame.
What teams did Mason Thompson play for?
Mason Thompson played for the San Diego Padres and the Washington Nationals.