Aaron Bummer
Relief Pitcher
#49
Player card
Aaron Bummer
Movement: FlatConfidence: LowBased on: season profile
Aaron Bummer rates 43/100 because the model is pricing 15.1 innings, 0 strikeouts, a 7.63 ERA, and a 1.83 WHIP for Free Agent. The call weighs production, role, momentum, availability, and ceiling; strongest inputs: STRIKEOUTS, COMMAND, RUN PREVENTION. Rafters value call is Watch with the movement label flat today. The caveat: role security keeps the call capped, availability is the main drag, no daily lift yet.
How to read this cardPitcher lens: innings, strikeouts, ERA/WHIP prevention, recent workload, and role shape the value call.
Rafters Morning Line packages player updates with scores, injuries, transactions, GameCast links, and Box Scores.
2026 · pitching
2026 · pitching
| GP | GS | W | L | ERA | WHIP | IP | K | BB | SV | HLD |
|---|---|---|---|---|---|---|---|---|---|---|
| 19 | 0 | 1 | 1 | 7.63 | 1.83 | 15.1 | 13 | 10 | 0 | 4 |
Career Snapshot
pitching · 2017–2026
| GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 408 | 2 | 22 | 22 | .500 | — | 4.07 | 1.35 | 398.1 | 442 | 175 | 2.5 | 362 | 204 | 180 | 5 | 94 | 20 |
Postseason Pitching · 2020–2024
| GP | L | W% | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | HLD |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6 | 1 | .000 | 3.68 | 1.23 | 7.1 | 9 | 3 | 3.0 | 6 | 3 | 3 | 3 |
Opponent Batting · 2017–2026
| P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6929 | 1728 | 4.010 | .240 | .329 | .342 | .671 | 56 | 4 | 30 | 516 | 186 | 30 | 4 | 11 | 15 |
Expanded Pitching · 2017–2026
| P/S | P/I | K/9 | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 229.5 | 17.4 | 10.0 | 649 | 371 | 1.7 | 211 | 87 | 26 | 1 | 59 | 12 | 13.0 |
Season by Season
pitching
| Season | Team | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | Chicago White Sox | 30 | 0 | 1 | 3 | .250 | 0.2 | 4.50 | 1.27 | 22.0 | 17 | 15 | 1.1 | 13 | 11 | 11 | 0 | 7 | 1 |
| 2018 | Chicago White Sox | 37 | 0 | 0 | 1 | .000 | -0.1 | 4.26 | 1.58 | 31.2 | 35 | 10 | 3.5 | 40 | 19 | 15 | 0 | 2 | 1 |
| 2019 | Chicago White Sox | 58 | 0 | 0 | 0 | .000 | 2.8 | 2.13 | 0.99 | 67.2 | 60 | 24 | 2.5 | 43 | 17 | 16 | 1 | 27 | 2 |
| 2020 | Chicago White Sox | 9 | 0 | 1 | 0 | 1.000 | 0.3 | 0.96 | 1.07 | 9.1 | 14 | 5 | 2.8 | 5 | 1 | 1 | 0 | 3 | 0 |
| 2021 | Chicago White Sox | 62 | 0 | 5 | 5 | .500 | 0.5 | 3.51 | 1.26 | 56.1 | 75 | 29 | 2.6 | 42 | 28 | 22 | 2 | 21 | 6 |
| 2022 | Chicago White Sox | 32 | 0 | 2 | 1 | .667 | 0.6 | 2.36 | 1.50 | 26.2 | 30 | 10 | 3.0 | 30 | 11 | 7 | 2 | 10 | 4 |
| 2023 | Chicago White Sox | 61 | 0 | 5 | 5 | .500 | -1.0 | 6.79 | 1.53 | 58.1 | 78 | 36 | 2.2 | 53 | 45 | 44 | 0 | 15 | 3 |
| 2024 | Atlanta Braves | 56 | 0 | 4 | 3 | .571 | 0.6 | 3.58 | 1.43 | 55.1 | 69 | 18 | 3.8 | 61 | 24 | 22 | 0 | 2 | 3 |
| 2025 | Atlanta Braves | 42 | 2 | 3 | 2 | .600 | 0.1 | 3.81 | 1.25 | 54.1 | 51 | 17 | 3.0 | 51 | 27 | 23 | 0 | 2 | 0 |
| 2026 | Atlanta Braves | 19 | 0 | 1 | 1 | .500 | -0.8 | 7.63 | 1.83 | 15.1 | 13 | 10 | 1.3 | 18 | 15 | 13 | 0 | 4 | 0 |
| 2026 | Kansas City Royals | 2 | 0 | 0 | 1 | .000 | -0.5 | 40.50 | 5.25 | 1.1 | 0 | 1 | 0.0 | 6 | 6 | 6 | 0 | 1 | 0 |
| 2026 | 2026 Totals | 21 | 0 | 1 | 2 | .333 | -1.3 | 10.26 | 2.10 | 16.2 | 13 | 11 | 1.2 | 24 | 21 | 19 | 0 | 5 | 0 |
Postseason Pitching
| Season | Team | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | Chicago White Sox | 2 | 0 | 0 | 0 | .000 | 0.0 | 0.00 | 1.50 | 1.1 | 1 | 1 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 |
| 2021 | Chicago White Sox | 3 | 0 | 0 | 1 | .000 | 0.0 | 8.10 | 1.80 | 3.1 | 7 | 1 | 7.0 | 5 | 3 | 3 | 0 | 1 | 0 |
| 2024 | Atlanta Braves | 1 | 0 | 0 | 0 | .000 | 0.0 | 0.00 | 0.38 | 2.2 | 1 | 1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
Opponent Batting
| Season | Team | P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | Chicago White Sox | 374 | 91 | 4.110 | .178 | .322 | .370 | .692 | 2 | 0 | 4 | 27 | 7 | 1 | 1 | 1 | 1 |
| 2018 | Chicago White Sox | 609 | 144 | 4.229 | .301 | .354 | .376 | .730 | 5 | 1 | 1 | 50 | 21 | 1 | 0 | 0 | 0 |
| 2019 | Chicago White Sox | 1039 | 262 | 3.966 | .184 | .268 | .252 | .520 | 4 | 0 | 4 | 59 | 18 | 3 | 1 | 0 | 2 |
| 2020 | Chicago White Sox | 155 | 38 | 4.079 | .152 | .263 | .152 | .415 | 0 | 0 | 0 | 5 | 4 | 0 | 0 | 0 | 0 |
| 2021 | Chicago White Sox | 962 | 242 | 3.975 | .202 | .310 | .250 | .560 | 1 | 0 | 3 | 52 | 22 | 4 | 0 | 1 | 3 |
| 2022 | Chicago White Sox | 457 | 117 | 3.906 | .288 | .359 | .375 | .734 | 3 | 0 | 2 | 39 | 16 | 2 | 0 | 1 | 0 |
| 2023 | Chicago White Sox | 1099 | 267 | 4.116 | .236 | .352 | .347 | .699 | 13 | 0 | 4 | 78 | 41 | 5 | 0 | 1 | 3 |
| 2024 | Atlanta Braves | 974 | 244 | 3.992 | .277 | .333 | .364 | .697 | 11 | 1 | 2 | 80 | 0 | 2 | 1 | 3 | 2 |
| 2025 | Atlanta Braves | 932 | 235 | 3.966 | .250 | .336 | .373 | .709 | 12 | 2 | 3 | 76 | 33 | 11 | 0 | 3 | 4 |
| 2026 | Atlanta Braves | 283 | 77 | 3.675 | .281 | .382 | .609 | .991 | 3 | 0 | 6 | 39 | 17 | 1 | 1 | 1 | 0 |
| 2026 | Kansas City Royals | 45 | 11 | 4.091 | .600 | .636 | 1.100 | 1.736 | 2 | 0 | 1 | 11 | 7 | 0 | 0 | 0 | 0 |
| 2026 | 2026 Totals | 328 | 88 | 3.727 | .324 | .414 | .676 | 1.089 | 5 | 0 | 7 | 50 | 24 | 1 | 1 | 1 | 0 |
Expanded Pitching
| Season | Team | P/S | P/I | K/9 | QS | CG | SHO | GSC | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | Chicago White Sox | 0.0 | 17.0 | 7.0 | 0 | 0 | 0 | 0.0 | 33 | 25 | 1.3 | 17 | 2 | 1 | 0 | 1 | 1 | 0.0 |
| 2018 | Chicago White Sox | 0.0 | 19.2 | 9.9 | 0 | 0 | 0 | 0.0 | 61 | 37 | 1.6 | 32 | 14 | 7 | 1 | 4 | 1 | 0.0 |
| 2019 | Chicago White Sox | 0.0 | 15.4 | 8.0 | 0 | 0 | 0 | 0.0 | 125 | 50 | 2.5 | 35 | 6 | 4 | 0 | 2 | 0 | 0.0 |
| 2020 | Chicago White Sox | 0.0 | 16.6 | 13.5 | 0 | 0 | 0 | 0.0 | 13 | 6 | 2.2 | 3 | 3 | 0 | 0 | 0 | 0 | 0.0 |
| 2021 | Chicago White Sox | 0.0 | 17.1 | 12.0 | 0 | 0 | 0 | 0.0 | 103 | 31 | 3.3 | 20 | 7 | 5 | 0 | 5 | 2 | 0.0 |
| 2022 | Chicago White Sox | 0.0 | 17.1 | 10.1 | 0 | 0 | 0 | 0.0 | 48 | 27 | 1.8 | 19 | 8 | 0 | 0 | 2 | 1 | 0.0 |
| 2023 | Chicago White Sox | 0.0 | 18.8 | 12.0 | 0 | 0 | 0 | 0.0 | 89 | 59 | 1.5 | 42 | 15 | 6 | 0 | 17 | 1 | 0.0 |
| 2024 | Atlanta Braves | 0.0 | 17.6 | 11.2 | 0 | 0 | 0 | 0.0 | 60 | 34 | 1.8 | 0 | 10 | 2 | 0 | 13 | 5 | 0.0 |
| 2025 | Atlanta Braves | 42.5 | 17.2 | 8.4 | 0 | 0 | 0 | 41.0 | 87 | 69 | 1.3 | 29 | 15 | 1 | 0 | 11 | 1 | 13.0 |
| 2026 | Atlanta Braves | 0.0 | 18.5 | 7.6 | 0 | 0 | 0 | 0.0 | 25 | 28 | 0.9 | 11 | 4 | 0 | 0 | 2 | 0 | 0.0 |
| 2026 | Kansas City Royals | 0.0 | 33.8 | 0.0 | 0 | 0 | 0 | 0.0 | 5 | 5 | 1.0 | 3 | 3 | 0 | 0 | 2 | 0 | 0.0 |
| 2026 | 2026 Totals | 0.0 | 19.7 | 7.0 | 0 | 0 | 0 | 0.0 | 30 | 33 | 0.9 | 14 | 7 | 0 | 0 | 4 | 0 | 0.0 |
Latest News
No recent Aaron Bummer news — check back as the season builds.
More on the Aaron Bummer news feed.
MLB player profile · ESPN public stats and Rafters box scores.