Aaron Bummer

29-Year-Old PitcherRP

Chicago White Sox

2023 Stats

W-L

0-0

ERA

0.00

WHIP

1.50

Rest-of-Season Projections

W-L

ERA

WHIP

Unlock Our Projections

2023 Fantasy Outlook

Bummer required two IL stints in 2022, first a minimum stay early in the season for a sore knee, then a more lengthy 3-month absence due to a shoulder/lat injury. This limited the southpaw to only 26.2 innings last season. Injuries appear to be part of the package for the 29-year-old, who has now missed time on the IL during each of the past three years. When healthy, Bummer is adept at inducing ground balls, as his career rate is 67.6%, which is roughly 25% above league average. He walks about four batters per nine innings, though, and the frequent grounders could lead to some BABIP and ratio instability. However, Bummer's role as one of the White Sox primary setup men appears secure, so expect him to provide holds as long as he's healthy. Read Past Outlooks

RANKSFrom Preseason

#594

ADP

Overall

League Majors

Bats L

Throws L

40 Man Yes

Height 6'3"

Weight 215

DOB 9/21/1993

Born Santa Clarita, CA

College Nebraska

Drafted 19th Rd 2014 CWS

Scheduled to pitch Friday

PChicago White Sox

Lat

March 22, 2023

Bummer (lat) is scheduled to appear in Friday's Cactus League game against the Athletics, Scott Merkin of MLB.com reports.

ANALYSIS
Bummer will be making his Cactus League debut against Oakland after missing the start of spring training with soreness in his right lat. The right-hander isn't a lock to make the Opening Day roster because of how much time he'll have missed, but his stint on the injured list would likely be short if he isn't available for the start of the season. Bummer could be in line for save chances for the White Sox at some point in 2023 with no defined closer for Chicago to begin the campaign.

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Pitching Stats

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2023

2022

2021

2020

2019

2018

2017

2023 MLB Game Log

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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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Minor League Game Log

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Pitching Appearances Breakdown

Average Pitch Count

Last 10 Games

Last 5 Games

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 2021

-30%

BAA vs LHP

2023

No Stats

2022

-28%

BAA vs LHP

2021

-34%

BAA vs LHP

	BAA	Batters	K	BB	H	2B	3B	HR
Since 2021vs Left	.179	123	44	10	20	1	0	0
Since 2021vs Right	.257	239	63	30	52	3	0	5
2023vs Left	.000	1	0	1	0	0	0	0
2023vs Right	.000	2	2	0	0	0	0	0
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
More Splits→	View More Split Stats

Home/Away Pitching Splits

Since 2021

-10%

ERA at Home

2023

No Stats

2022

-40%

ERA at Home

2021

-6%

ERA at Home

	ERA	WHIP	IP	W	L	SV	K/9	BB/9	HR/9
Since 2021Home	2.95	1.24	39.2	4	2	0	10.4	4.1	0.5
Since 2021Away	3.27	1.43	44.0	3	4	4	12.5	4.5	0.6
2023Home	0	0	0	0	0	0	0	0	0
2023Away	0.00	1.50	.666666	0	0	0	27.0	13.5	0.0
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
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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

2.00

K/9

27.0

BB/9

13.5

HR/9

0.0

Fastball

0.0 mph

ERA

0.00

WHIP

1.50

BABIP

.000

GB/FB

0.00

Left On Base

100.0%

Swinging Strike

29.4%

Advanced Pitching Stats

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Defensive Stats

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Stats Vs Today's Lineup

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White Sox Depth Chart

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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

Throws first bullpen session

PChicago White Sox

Lat

March 9, 2023

Bummer (lat) threw a bullpen session Thursday, James Fegan of The Athletic reports.

ANALYSIS
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On track with shoulder/lat issue

PChicago White Sox

Shoulder

March 1, 2023

White Sox manager Pedro Grifol said Wednesday that Bummer (shoulder/lat) is on track to be ready for Opening Day, Daryl Van Schouwen of the Chicago Sun-Times reports.

ANALYSIS
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