Aaron Bummer

Aaron Bummer

29-Year-Old PitcherRP
Chicago White Sox
2023 Fantasy Outlook
There was no outlook written for Aaron Bummer in 2023. Check out the latest news below for more on his current fantasy value.
RANKSFrom Preseason
$Signed a five-year, $16 million contract extension with the White Sox in February of 2020.
Saves game in extra innings
PChicago White Sox
September 18, 2022
Bummer picked up the save Saturday against the Tigers, allowing one run on one hit while striking out one batter and walking none over one inning.
ANALYSIS
Although Bummer gave up a run in the 11th inning of Saturday's contest, the White Sox had already given him two runs of wiggle room. Bummer was credited with the save, his second of the season. In five innings this month, the reliever has a blown save and two wins in addition to Saturday's save.
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Pitching Stats
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2022
2021
2020
2019
2018
2017
2022 MLB Game Log
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2021 MLB Game Log
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2020 MLB Game Log
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2019 MLB Game Log
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2018 MLB Game Log
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2017 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
14
Last 10 Games
11
Last 5 Games
10
How many pitches does Aaron Bummer generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Aaron Bummer generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2020
 
 
-25%
BAA vs LHP
2022
 
 
-28%
BAA vs LHP
2021
 
 
-34%
BAA vs LHP
2020
 
 
-57%
BAA vs RHP
BAA Batters K BB H 2B 3B HR
Since 2020vs Left .184 135 48 9 23 1 0 0
Since 2020vs Right .245 262 71 35 54 3 0 5
2022vs Left .231 47 12 7 9 1 0 0
2022vs Right .323 70 18 3 21 2 0 2
2021vs Left .151 75 32 2 11 0 0 0
2021vs Right .230 167 43 27 31 1 0 3
2020vs Left .231 13 4 0 3 0 0 0
2020vs Right .100 25 10 5 2 0 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2020
 
 
-2%
ERA at Home
2022
 
 
-40%
ERA at Home
2021
 
 
-6%
ERA at Home
2020
 
 
-100%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2020Home 2.89 1.31 43.2 4 2 0 10.3 4.7 0.4
Since 2020Away 2.96 1.32 48.2 4 4 4 12.8 3.9 0.6
2022Home 1.69 1.69 10.2 0 1 0 9.3 4.2 0.0
2022Away 2.81 1.38 16.0 2 0 2 10.7 2.8 1.1
2021Home 3.41 1.07 29.0 4 1 0 10.9 4.0 0.6
2021Away 3.62 1.46 27.1 1 4 2 13.2 5.3 0.3
2020Home 2.25 2.00 4.0 0 0 0 9.0 11.3 0.0
2020Away 0.00 0.38 5.1 1 0 0 16.9 0.0 0.0
More Splits View More Split Stats
Stat Review
How does Aaron Bummer compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
3.00
 
K/9
10.1
 
BB/9
3.4
 
HR/9
0.7
 
Fastball
94.5 mph
 
ERA
2.36
 
WHIP
1.50
 
BABIP
.383
 
GB/FB
9.60
 
Left On Base
78.0%
 
Exit Velocity
84.3 mph
 
Barrels/BBE
6.3%
 
Spin Rate
2172 rpm
 
Balls Hit 95+ MPH
32.3%
 
Swinging Strike
10.5%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Aaron Bummer
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219 days ago
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242 days ago
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Playoff Primer: The Rankings
October 5, 2021
Todd Zola ranks players by position for fantasy playoff leagues. Chicago's Jose Abreu is tough to beat at first base.
The Z Files: My Top 250 Rest-of-Season Pitchers
August 16, 2021
Todd Zola offers his projected pitcher rankings for the stretch run as two National League teams split the top four spots between them.
Collette Calls: Everyone Gets A Save!
August 11, 2021
Jason Collette looks at the league-wide saves situation, as it seems these days that everyone gets a save!
Past Fantasy Outlooks
2022
2021
2020
2019
2018
Bummer proved that his small-sample spike in strikeouts in 2020 wasn't a fluke, as he was once again able to top a 30 K% in 2021 across 56.1 innings. Even better was that he didn't sacrifice his primary identity as a groundball pitcher by turning in his third consecutive season with a groundball rate over 65%. Unsurprisingly, that has helped him limit home runs, and he's been able to limit hitters to 0.6 HR/9 across 187 career innings. In most cases, that combination of skills would lead to a pitcher receiving a look as closer, though Bummer has largely been limited to a setup role throughout his career. That isn't likely to change in 2022, as the White Sox boast a tremendous trio in the back of their bullpen in Liam Hendriks, Craig Kimbrel and Kendall Graveman. While we expect Kimbrel to get dealt at some point later in the offseason, Bummer's value is still likely tied to his strong ratios and plenty of strikeouts.
The closer job for the White Sox briefly opened up after Alex Colome left in free agency, but despite his recent success Bummer was denied a chance to compete for it when the club signed Liam Hendriks. It's tough to get too excited about the 27-year-old lefty's 2020 campaign, as bicep issues limited him to just nine appearances, but Bummer was excellent when available, posting a 0.96 ERA and a 36.8 K%. It's difficult to expect anything close to a repeat of that performance in 2021 given the size of the sample and the fact that he posted a rather modest 22.9 K% during his breakout 2019 campaign. Still, that's now two years where he's looked like a high-leverage option, with an elite 71.7% groundball rate over that stretch keeping him in that tier despite modest numbers elsewhere. He doesn't have a traditional closer's profile, but Bummer should remain in the late-inning mix.
Bummer spent the previous two seasons as an unremarkable middle reliever for the White Sox, but he turned into a high-leverage option in his age-26 season and recorded 27 holds. Overall he had a 2.13 ERA and 0.99 WHIP across 67.2 innings, and he held both righties and lefties to a sub-.200 average. The left-hander interestingly saw his strikeout rate drop (22.9%) and his walk rate rise (9.2%), but he relied much more heavily on his fastball (76.4% usage) and saw an uptick in velocity (95.5 mph) to help induce a 72.1% groundball rate. Barring any free-agent additions, Bummer should enter spring training in the setup role to closer Alex Colome, who went 30-for-33 in save opportunities.
After vaulting up the organizational ladder in 2017, Bummer was rewarded with an Opening Day roster spot. Early on, the southpaw was used almost exclusively in one- or two-batter stints, largely as a specialist. The results were promising, as he posted a 3.26 ERA and a 21:6 K:BB in 19.1 frames before being shuttled back to the minors. He returned to the big leagues for the month of September and was touched up a bit to the tune of eight runs in 12.1 innings. Despite the struggles at the end, 2018 was largely a success for the 25-year-old. His 65:21 K:BB in 61.2 innings between the majors and minors was strong, and he held left-handed hitters to a .245 batting average. Plus, his 2.44 FIP fell well below his 4.26 ERA for the season, suggesting he was the subject of some bad luck. He figures to have a role in the middle innings in 2019.
Last season marked the first complete campaign for Bummer since he underwent Tommy John surgery in 2015. The White Sox started him at High-A, and he pitched at four levels last season while eventually getting the call to Chicago. In the minors, he struck out a batter per inning at each of his three stops, but he struggled to miss bats as a big-league reliever in his debut. Additionally, his walk rate spiked to a career-worst 6.1 BB/9, which kept the White Sox from relying on him in high-leverage spots. There are a few positives, however, including a track record of better control and his ability to get outs on the ground (54.4 percent groundball rate). With a low-90s fastball and slider combo, Bummer should get more opportunities to stick with the White Sox in 2018, but he may wind up bouncing between Charlotte and Chicago if he fails to cut back on the free passes.
More Fantasy News
Reinstated from IL
PChicago White Sox
September 5, 2022
Bummer (shoulder) was reinstated from the 60-day injured list Monday.
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Shifts to 60-day injured list
PChicago White Sox
Shoulder
September 2, 2022
Bummer (shoulder) was transferred to the 60-day injured list Friday.
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Nearing rehab assignment
PChicago White Sox
Shoulder
August 27, 2022
Bummer (shoulder) will begin a rehab assignment at Triple-A Charlotte on Tuesday, James Fegan of The Athletic reports.
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Steps back on mound
PChicago White Sox
Shoulder
August 18, 2022
Bummer (shoulder) completed a 26-pitch bullpen session Thursday, James Fegan of The Athletic reports.
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Not yet throwing off mound
PChicago White Sox
Shoulder
July 7, 2022
Manager Tony La Russa said Thursday that Bummer (shoulder) isn't yet throwing off a mound, James Fegan of The Athletic reports.
ANALYSIS
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