Aaron Bummer

Pitcher · Career Stats, Bio & Records (2017-2026)

Aaron Bummer is a pitcher who has played in Major League Baseball since 2017 for the Chicago White Sox and the Atlanta Braves, a span of 10 seasons. Across 408 career appearances, he has gone 22-22 with a 4.07 ERA and 442 strikeouts. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 9247.2.

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 22–22
ERA 4.07
WHIP 1.35
SO 442
Pitcher PIV thru 2025 9247.2
Position
Pitcher
Bats / Throws
L / L
Height / Weight
6'3" / 215 lb
Born
9/21/1993 in Valencia, CA, USA
MLB Debut
2017-07-27

Full name: Aaron James Bummer

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Career Pitching Statistics

Aaron Bummer — Career Pitching Statistics
W L G GS CG SHO SV IP H ER HR BB SO ERA Pitcher PIV
22 22 408 2 0 0 5 398.1 362 180 30 175 442 4.07 9247.2

Career ERA 4.07 vs. league average 4.23 across their career seasons — near league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Aaron Bummer Stats, Bio & Career Records
Year Team Lg W L G GS CG SHO SV IP H ER BB SO ERA Lg ERA Pitcher PIV
2017 CHA AL 1 3 30 0 0 0 0 22.0 13 11 15 17 4.50 4.36 (-3%) -989.8
2018 CHA AL 0 1 37 0 0 0 0 31.2 40 15 10 35 4.26 4.15 (-3%) 1391.3
2019 CHA AL 0 0 58 0 0 0 1 67.2 43 16 24 60 2.13 4.51 (+53%) 1884.8
2020 CHA AL 1 0 9 0 0 0 0 9.1 5 1 5 14 0.96 4.45 (+78%) 0.0
2021 CHA AL 5 5 62 0 0 0 2 56.1 42 22 29 75 3.51 4.27 (+18%) 1864.2
2022 CHA AL 2 1 32 0 0 0 2 26.2 30 7 10 30 2.36 3.97 (+40%) 523.5
2023 CHA AL 5 5 61 0 0 0 0 58.1 53 44 36 78 6.79 4.33 (-57%) 1108.3
2024 ATL NL 4 3 56 0 0 0 0 55.1 61 22 18 69 3.58 4.08 (+12%) 2590.2
2025 ATL NL 3 2 42 2 0 0 0 54.1 51 23 17 51 3.81 4.16 (+8%) 874.7
2026 KC AL 1 2 21 0 0 0 0 16.2 24 19 11 13 10.26 4.18 (-146%) -
Career · 10 seasons 22 22 408 2 0 0 5 398.1 362 180 175 442 4.07 — 9,247

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

Aaron Bummer — Career Batting Statistics
G AB R H 2B 3B HR RBI SB BB SO AVG OBP SLG OPS PIV
387 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.

Aaron Bummer Stats, Bio & Career Records
Year Team Lg G AB R H 2B 3B HR RBI SB BB SO AVG Lg AVG Lg OBP Lg SLG Lg OPS PIV
2017 CHA AL 30 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2018 CHA AL 37 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2019 CHA AL 58 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2020 CHA AL 9 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2021 CHA AL 62 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2022 CHA AL 32 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2023 CHA AL 61 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2024 ATL NL 56 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2025 ATL NL 42 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
Career · 9 seasons 387 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.

Postseason Statistics

Playoff Career Batting

Aaron Bummer — Playoff Career Batting
G AB R H 2B 3B HR RBI BB SO AVG
6 0 0 0 0 0 0 0 0 0 .000

Playoff Batting by Year

Aaron Bummer — Playoff Batting by Year
Year Round Team G AB R H 2B 3B HR RBI BB SO AVG
2024 NLWC2 ATL 1 0 0 0 0 0 0 0 0 0 .000
2021 ALDS1 CHA 3 0 0 0 0 0 0 0 0 0 .000
2020 ALWC4 CHA 2 0 0 0 0 0 0 0 0 0 .000

Playoff Career Pitching

Aaron Bummer — Playoff Career Pitching
W L G GS SV IP H ER BB SO ERA
0 1 6 0 0 7.1 6 3 3 9 3.68

Playoff Pitching by Year

Aaron Bummer — Playoff Pitching by Year
Year Round Team W L G GS SV IP H ER BB SO ERA
2024 NLWC2 ATL 0 0 1 0 0 2.2 0 0 1 1 0.00
2021 ALDS1 CHA 0 1 3 0 0 3.1 5 3 1 7 8.10
2020 ALWC4 CHA 0 0 2 0 0 1.1 1 0 1 1 0.00

Game Log & Splits

View full game log (774 games) →

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

Batting — Home / Away

Aaron Bummer — Batting — Home / Away
SplitGABRHHRRBIAVG
Home20100000—
Away18600000—

Pitching — Home / Away

Aaron Bummer — Pitching — Home / Away
SplitGIPHERBBSOERA
Home201203.217271732363.14
Away186178.016690911934.55

Last 10 Games — Pitching

Aaron Bummer — Last 10 Games — Pitching
DateTmOppDecIPHRERBBSOHR
2025-08-23 ATLNYN — 1.1000000
2025-08-17 ATLCLE W 2.0100010
2025-08-13 ATLNYN W 2.1200130
2025-08-09 ATLMIA — 1.2211010
2025-08-06 ATLMIL — 2.1200010
2025-08-04 ATLMIL — 1.2000010
2025-07-29 ATLKCR — 0.2222110
2025-07-25 ATLTEX — 0.2100100
2025-07-23 ATLSFG — 0.2100000
2025-07-21 ATLSFG — 1.0100000

Fielding Statistics

Career Fielding Totals by Position

Aaron Bummer — Career Fielding Totals by Position
Position G GS PO A E DP
P 387 2 19 56 8 5

Season-by-Season Fielding

Aaron Bummer — Season-by-Season Fielding
Year Team Pos G GS PO A E DP
2017 CHA P 30 0 1 6 1 1
2018 CHA P 37 0 1 2 0 1
2019 CHA P 58 0 4 12 1 1
2020 CHA P 9 0 0 0 1 0
2021 CHA P 62 0 2 9 1 2
2022 CHA P 32 0 0 2 0 0
2023 CHA P 61 0 7 7 1 0
2024 ATL P 56 0 1 10 1 0
2025 ATL P 42 2 3 8 2 0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Aaron Bummer Stats, Bio & Career Records
Position Games
Pitcher 387

Most Similar Players

Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.

  1. 98
    Chasen Shreve
    22-14, 3.96 ERA
  2. 95
    Michael Wuertz
    21-11, 3.71 ERA
  3. 89
    Antonio Osuna
    36-29, 3.68 ERA
  4. 79
    Phil Maton
    23-21, 4.10 ERA
  5. 79
    Hansel Robles
    28-26, 4.11 ERA
  6. 78
    Neal Cotts
    21-24, 3.96 ERA

Aaron Bummer: the record in brief

The debut date in the bio is July 27, 2017; Aaron Bummer is an active player, and this profile updates as the season goes on. The season rows list, in order, the Chicago White Sox (2017 to 2023) and the Atlanta Braves (2024 through 2025). Bummer, a pitcher by primary position, batted and threw left-handed. Height and weight on file: 215 pounds on a 6-foot-3 frame. Bummer was born on September 21, 1993, in Valencia, CA, USA. On the record, Aaron Bummer was born Aaron James Bummer.

The pitching table credits Bummer with a 22-22 record and a 4.07 ERA in 408 games. The same table counts 442 strikeouts. Bummer's 4.07 ERA was close to the 4.23 league figure for those seasons. No season topped the 5 wins of 2021. Bummer struck out 78 batters in 2023, a career high. In 2019, one of the busiest seasons, Bummer posted a 2.13 ERA; the league figure that year was 4.51. Pitcher PIV, the site's era-adjusted run-prevention measure, totals 9,247.2 for Bummer's career.

The playoff pitching line reads 0-1, 3.68 ERA, across 6 appearances. Those appearances came in 2020, 2021, and 2024.

Every defensive appearance on record for Bummer, 387 games, came at pitcher. On the mound, Bummer's fielding totals are 19 putouts, 56 assists and 8 errors.

Frequently Asked Questions about Aaron Bummer

What years did Aaron Bummer play?
Aaron Bummer played in Major League Baseball from 2017 to 2026.
Was Aaron Bummer a pitcher?
Yes. Aaron Bummer pitched in the major leagues, recording 22 wins and 442 strikeouts.
What was Aaron Bummer's career ERA?
Aaron Bummer finished with a 4.07 career ERA, going 22-22 with 442 strikeouts.
How many strikeouts did Aaron Bummer have?
Aaron Bummer recorded 442 career strikeouts.
Is Aaron Bummer in the Hall of Fame?
No. Aaron Bummer has not been inducted into the National Baseball Hall of Fame.
What teams did Aaron Bummer play for?
Aaron Bummer played for the Chicago White Sox and the Atlanta Braves.