Aaron Bummer #36
Kansas City Royals
- P
- B/T: L/L
- 6' 3"/215
- Age: 32
- Aaron James Bummer
- Status: Active
- Nickname: Bum
- Born: 9/21/1993 in Valencia, CA
- Draft: 2014, Chicago White Sox, Round: 19, Overall Pick: 558
- College: Nebraska
- MLB Debut: 7/27/2017
2026 Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 10 | 1-0 | 3.48 | 10.1 | 13 | 1.06 |
2026 Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 20 | 1-1 | 8.82 | 16.1 | 13 | 1.96 |
2023 Stats
| AB | AVG | HR | RBI | SB | OPS |
|---|---|---|---|---|---|
| 0 | .000 | 0 | 0 | 0 | .000 |
MiLB Career Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 107 | 5-10 | 3.25 | 138.1 | 151 | 1.25 |
MLB Career Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 407 | 22-21 | 4.00 | 398.0 | 442 | 1.34 |
MLB Career Stats
| AB | AVG | HR | RBI | SB | OPS |
|---|---|---|---|---|---|
| 0 | .000 | 0 | 0 | 0 | .000 |
| Year | AB | R | H | HR | RBI | SB | AVG | OBP | OPS |
|---|---|---|---|---|---|---|---|---|---|
| 2023 MLB Stats | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| MLB Career Stats | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| Year | W | L | ERA | G | GS | SV | IP | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2026 MiLB Stats | 1 | 0 | 3.48 | 10 | 1 | 1 | 10.1 | 13 | 1.06 |
| 2026 MLB Stats | 1 | 1 | 8.82 | 20 | 0 | 0 | 16.1 | 13 | 1.96 |
| MiLB Career Stats | 5 | 10 | 3.25 | 107 | 2 | 7 | 138.1 | 151 | 1.25 |
| MLB Career Stats | 22 | 21 | 4.00 | 407 | 2 | 5 | 398.0 | 442 | 1.34 |
- Next KC Game: 8-06 vs MIN
Splits
| Duration | W | L | ERA | G | GS | SV | IP | H | ER | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Last 7 Games | 1 | 0 | 12.71 | 6 | 0 | 0 | 5.2 | 8 | 8 | 7 | 6 | 2.65 |
| Last 15 Games | 1 | 1 | 9.75 | 14 | 0 | 0 | 12.0 | 17 | 13 | 9 | 10 | 2.17 |
| Last 30 Games | 1 | 1 | 7.63 | 19 | 0 | 0 | 15.1 | 18 | 13 | 10 | 13 | 1.83 |
| Last 3 Games | W | L | SV | IP | H | ER | BB | SO |
|---|---|---|---|---|---|---|---|---|
| 8/2 @ COL | 0 | 0 | 0 | 1.0 | 4 | 3 | 0 | 0 |
| 5/18 @ MIA | 0 | 0 | 0 | 1.0 | 3 | 6 | 5 | 1 |
| 5/14 vs CHC | 0 | 0 | 0 | 1.1 | 0 | 0 | 0 | 1 |
2026 :
RP
(20)
More Aaron Bummer
White Sox promote Bummer to Major Leagues
Dash blank Hillcats in Dunning's High-A debut
Collins, Banks lead Dash past Wood Ducks
Thompson, bullpen shine in Winston's 2-1 win
Opening Day roster features many key returners
Latest Transactions
| Team | Date | Transaction |
|---|---|---|
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August 2, 2026 | Kansas City Royals selected the contract of LHP Aaron Bummer from Omaha Storm Chasers. |
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July 21, 2026 | Kansas City Royals signed free agent LHP Aaron Bummer to a minor league contract. |
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July 21, 2026 | LHP Aaron Bummer assigned to Omaha Storm Chasers. |
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July 16, 2026 | Iowa Cubs released LHP Aaron Bummer. |
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June 30, 2026 | LHP Aaron Bummer assigned to Iowa Cubs from ACL Cubs. |
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June 20, 2026 | ACL Cubs activated LHP Aaron Bummer. |
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June 1, 2026 | LHP Aaron Bummer assigned to ACL Cubs. |
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June 1, 2026 | Chicago Cubs signed free agent LHP Aaron Bummer to a minor league contract. |
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May 19, 2026 | Atlanta Braves released LHP Aaron Bummer. |
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April 16, 2026 | LHP Aaron Bummer changed number to 49. |
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April 15, 2026 | LHP Aaron Bummer changed number to 42. |
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November 6, 2025 | Atlanta Braves activated LHP Aaron Bummer from the 60-day injured list. |
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September 18, 2025 | Atlanta Braves transferred LHP Aaron Bummer from the 15-day injured list to the 60-day injured list. Left shoulder inflammation. |
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August 24, 2025 | Atlanta Braves placed LHP Aaron Bummer on the 15-day injured list. Left shoulder inflammation. |
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April 16, 2025 | LHP Aaron Bummer changed number to 49. |
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April 15, 2025 | LHP Aaron Bummer changed number to 42. |
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April 14, 2025 | Atlanta Braves activated LHP Aaron Bummer from the bereavement list. |
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April 11, 2025 | Atlanta Braves placed LHP Aaron Bummer on the bereavement list. |
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November 16, 2023 | Chicago White Sox traded LHP Aaron Bummer to Atlanta Braves for RHP Michael Soroka, LHP Jared Shuster, SS Nicky Lopez, SS Braden Shewmake and RHP Riley Gowens. |
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September 5, 2022 | Chicago White Sox activated LHP Aaron Bummer from the 60-day injured list. |
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September 2, 2022 | Chicago White Sox placed LHP Aaron Bummer on the 60-day injured list. Left lat strain. |
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August 30, 2022 | Chicago White Sox sent LHP Aaron Bummer on a rehab assignment to Charlotte Knights. |
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June 12, 2022 | Chicago White Sox placed LHP Aaron Bummer on the 15-day injured list retroactive to June 9, 2022. Left lat strain. |
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May 22, 2022 | Chicago White Sox activated LHP Aaron Bummer from the 15-day injured list. |
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May 9, 2022 | Chicago White Sox placed LHP Aaron Bummer on the 15-day injured list retroactive to May 7, 2022. Right knee strain. |
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July 15, 2021 | Chicago White Sox activated LHP Aaron Bummer from the 10-day injured list. |
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June 30, 2021 | Chicago White Sox placed LHP Aaron Bummer on the 10-day injured list. Right hamstring strain. |
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September 24, 2020 | Chicago White Sox activated P Aaron Bummer from the 60 day injured list. |
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September 24, 2020 | Chicago White Sox activated P Aaron Bummer from the 60 day injured list. |
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September 24, 2020 | Chicago White Sox activated LHP Aaron Bummer from the 60-day injured list. |
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September 5, 2020 | Chicago White Sox transferred LHP Aaron Bummer from the 10-day injured list to the 60-day injured list. Left biceps strain. |
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August 8, 2020 | Chicago White Sox placed LHP Aaron Bummer on the 10-day injured list. Left biceps strain. |
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April 28, 2019 | Chicago White Sox recalled LHP Aaron Bummer from Charlotte Knights. |
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April 12, 2019 | Charlotte Knights activated LHP Aaron Bummer from the 7-day injured list. |
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April 4, 2019 | Charlotte Knights placed LHP Aaron Bummer on the 7-day injured list. |
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March 18, 2019 | Chicago White Sox optioned LHP Aaron Bummer to Charlotte Knights. |
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September 1, 2018 | Chicago White Sox recalled Aaron Bummer from Charlotte Knights. |
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June 7, 2018 | Chicago White Sox optioned LHP Aaron Bummer to Charlotte Knights. |
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February 16, 2018 | Aaron Bummer changed number to . |
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July 27, 2017 | Chicago White Sox selected the contract of LHP Aaron Bummer from Charlotte Knights. |
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July 17, 2017 | LHP Aaron Bummer assigned to Charlotte Knights from Birmingham Barons. |
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May 5, 2017 | LHP Aaron Bummer assigned to Birmingham Barons from Winston-Salem Dash. |
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April 6, 2017 | LHP Aaron Bummer assigned to Winston-Salem Dash from Charlotte Knights. |
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January 23, 2017 | Chicago White Sox invited non-roster LHP Aaron Bummer to spring training. |
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September 1, 2016 | LHP Aaron Bummer assigned to Charlotte Knights from Winston-Salem Dash. |
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August 19, 2016 | LHP Aaron Bummer assigned to Winston-Salem Dash from Great Falls Voyagers. |
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July 19, 2016 | Great Falls Voyagers activated LHP Aaron Bummer from the 7-day disabled list. |
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July 7, 2016 | Great Falls Voyagers sent LHP Aaron Bummer on a rehab assignment to AZL White Sox. |
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June 16, 2016 | Great Falls Voyagers placed LHP Aaron Bummer on the 7-day disabled list. |
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September 9, 2015 | Great Falls Voyagers activated LHP Aaron Bummer from the 7-day disabled list. |
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June 17, 2015 | Great Falls Voyagers placed LHP Aaron Bummer on the 7-day disabled list. |
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June 16, 2014 | LHP Aaron Bummer assigned to Great Falls Voyagers. |
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June 10, 2014 | Chicago White Sox signed LHP Aaron Bummer. |
+ Show More Transactions
League Rankings
Hit By Pitch
| HBP | ||
|---|---|---|
| 2025 | 11 | in NL |
At Bats
| AB | ||
|---|---|---|
| 2026 | 71 | in |
| 2026 | 7 | in AL |
| 2026 | 64 | in NL |
| 2026 | 32 | in |
| 2026 | 14 | in INT |
| 2026 | 18 | in INT |
| 2026 | 7 | in ACL |
| 2026 | 39 | in |