Washington Nationals12 games
3-9his teams
His line: 10.2 IP, 10 K, 4.22 ERA
Last met Apr 21, 2026
BaseballMLBPitcher
Aaron Bummer
Stats, career and game logAaron Bummer is a left-handed pitcher for the Kansas City Royals in MLB.
168MLB games since 2023202strikeouts
Updated
About Aaron Bummer
Aaron Bummer, a left-handed pitcher for the Kansas City Royals, was born on September 21, 1993, in Valencia, California, United States. He played college baseball for the Nebraska Cornhuskers and made his MLB debut on Jul 27, 2017, with the Chicago White Sox. In the 2024 regular season, he pitched in 56 games for the Atlanta Braves with a 3.58 ERA and 69 strikeouts in 55.1 innings.
Agatha Research DeskUpdated Oct 5, 2026Season by season168
Regular season and playoffs, every MLB appearance in our records since 2023, newest season first.
| Season | Team | Games | Starts | IP | K | BB | ERA | WHIP | Playoffs |
|---|---|---|---|---|---|---|---|---|---|
| 2026 | ATL, KC | 21 | 0 | 16.2 | 13 | 11 | 10.26 | 2.10 | - |
| 2025 |  ATL | 42 | 2 | 54.1 | 51 | 17 | 3.81 | 1.25 | - |
| 2024 | ATL | 56 | 0 | 55.1 | 69 | 18 | 3.58 | 1.43 | 1 g: 2.2 IP, 0.00 ERA |
| 2023 |  CHW | 47 | 0 | 49.0 | 69 | 27 | 5.69 | 1.39 | - |
| Career | 166 | 2 | 175.1 | 202 | 73 | 4.88 | 1.43 | 1 g: 2.2 IP, 0.00 ERA |
How he is doing now
2026 pitching10.26 ERA16.2 innings, 13 strikeouts, 2.10 WHIP
Last game0.1 IP, 0 K, 3 ERAug 6 vs Twins
Injury status
No injury reports on file.
Career
9years2017 to 2026
- 2023First game in our records6-4 win vs Twins
- 2023Best season49.0 IP, 69 K, 5.69 ERA in 47 games
- 2025Best start2.1 IP, 5 K, 3 ER, vs Orioles
- Aug 6, 2026Latest game0.1 IP, 0 K, 3 ER vs Twins
Regular season
166 games
175.1 IP, 202 K, 4.88 ERA; since 2023
Playoffs
1 game
2.2 IP, 1 K, 0.00 ERA; since 2023
First game in our records
May 3, 2023: 0.2 IP, 1 K, 0 ERCHW 6, Twins 4
Latest game
Aug 6, 2026: 0.1 IP, 0 K, 3 ERTwins 4, KC 3
Most often against
The teams he has faced most, with his teams' record and his line against each.
Philadelphia Phillies11 games
6-5his teams
His line: 10.1 IP, 9 K, 4.35 ERA
Last met Apr 26, 2026
Miami Marlins10 games
5-5his teams
His line: 9.2 IP, 10 K, 12.10 ERA
Last met May 18, 2026
New York Mets9 games
3-6his teams
His line: 13.0 IP, 12 K, 0.69 ERA
Last met Aug 23, 2025
Kansas City Royals8 games
3-5his teams
His line: 6.1 IP, 9 K, 14.21 ERA
Last met Mar 28, 2026
Milwaukee Brewers8 games
0-8his teams
His line: 10.0 IP, 11 K, 1.80 ERA
Last met Aug 6, 2025
Sources and updates
Stats, scores and injury reports come from Agatha's own records: MLB's own box scores, its transactions and ESPN's injury reports.
Updated Oct 5, 2026, 3:07 PM ET. Results and form refresh after every game; biography facts are checked weekly.