Aaron Bummer

Bats L Throws L6'3" 215 lbBorn 1993 Valencia, USADebut 2017Team ATLDraft 2011 R31 #959 New York Yankees, Sunrise Mountain (AZ) HS

Projections

Season	BF	K%	BB%	HR%	1B%	XBH%	PITCH+
2026	176	23.2	7.8	2.16	22.5	6.22	103.0
2027							103.2
2028							104.1

Projected rates are per plate appearance or batter faced; counting stats scale with projected playing time. Statcast measurements inform these projections as inputs and are reported as measurements, not projected.

Most similar through age 31

His ten closest age-31 comparables averaged 82 PITCH+ the next season; 10 of 10 played. Averages cover only the players who got a next season, which is why the played count matters.

#	Player	Through	PITCH+ then	Next season	Next PA / BF
1	Taylor Rogers	2022	108.5	105.4	216
2	Mychal Givens	2021	109.5	95.3	260
3	Bryan Shaw	2019	105.1	30.8	38
4	Hector Rondon	2019	109.4	71.1	97
5	John Axford	2014	106.1	102.6	250
6	Jim Johnson	2014	105.6	94.9	291
7	David Riske	2008	105.5	1.2	6
8	Emilio Pagan	2022	103.9	124.3	273
9	Jonathan Broxton	2015	111.2	106.6	259
10	Alexi Ogando	2015	107.4	92.3	148

Pitching

Year	Team	W	L	ERA	G	GS	SV	IP	BF	HR	BB	SO	PITCH+
2027 proj									176				103.2
2026*									88				70.2	98.8	69.0
2025	ATL	3	2	3.81	42	2	0	54.3	235	3	17	51	98.9	109.7	108.6
2024	ATL	4	3	3.58	56	0	0	55.3	244	2	18	69	101.2	96.0	97.2
2023	CWS	5	5	6.79	61	0	0	58.3	267	4	36	78	99.9	108.8	108.6
2022	CWS	2	1	2.36	32	0	2	26.7	117	2	10	30	93.8	97.4	91.3
2021	CWS	5	5	3.51	62	0	2	56.3	242	3	29	75	116.9	99.9	116.8
2020	CWS	1	0	0.96	9	0	0	9.3	38	0	5	14	135.8	94.5	130.3
2019	CWS	0	0	2.13	58	0	1	67.7	262	4	24	60	126.7	103.8	130.5
2018	CWS	0	1	4.26	37	0	0	31.7	144	1	10	35	96.9	95.0	91.9
2017	CWS	1	3	4.50	30	0	0	22.0	91	4	15	17	105.0	109.4	114.4
Career		21	20	3.80	387	2	5	381.7	1640	23	164	429	107.1		109.7

Fielding

Year	Team	Pos	G	Inn	PO	A	E	DP	Fld%	Runs saved
2025	ATL	P	42	54	3	8	2	0	0.846	+2.8
2024	ATL	P	56	55	1	10	1	0	0.917	-1.2
2023	CWS	P	61	58	7	7	1	0	0.933	+2.9
2022	CWS	P	32	27	0	2	0	0	1.000	-0.4
2021	CWS	P	62	56	2	9	1	2	0.917	-0.0
2020	CWS	P	9	9	0	0	1	0	0.000	-0.3
2019	CWS	P	58	68	4	12	1	1	0.941	+1.2
2018	CWS	P	37	32	1	2	0	1	1.000	-0.9
2017	CWS	P	30	22	1	6	1	1	0.875	+1.0

Runs saved covers the Statcast era; for catchers it includes framing.

Minor leagues

Year	Level	Team	Side	PA / BF	Line	AVG / ERA
2026	AAA	nan	Pit	34	8.1 IP, 29% K	4.44
2019	AAA	Charlotte Knights	Pit	32	7.2 IP, 19% K	2.50
2018	AAA	Charlotte Knights	Pit	128	30.2 IP, 23% K	2.68
2017	AAA	Charlotte Knights	Pit	20	5.0 IP, 25% K	1.80
2017	AA	Birmingham Barons	Pit	137	33.0 IP, 25% K	3.00
2017	A+	Winston-Salem Dash	Pit	47	11.0 IP, 32% K	4.91
2016	A+	Winston-Salem Dash	Pit	22	5.0 IP, 5% K	1.80
2016	Rk	Great Falls Voyagers	Pit	35	8.0 IP, 31% K	3.38
2016	Rk	nan	Pit	53	11.2 IP, 32% K	6.43
2014	Rk	Great Falls Voyagers	Pit	89	22.0 IP, 31% K	2.45

Splits

Year	vs LHP	vs RHP	Home	Away
2026	0.479	0.469	0.412	0.537
2025	0.302	0.329	0.286	0.350
2024	0.329	0.316	0.283	0.366
2023	0.309	0.325	0.358	0.277
2022	0.284	0.361	0.361	0.310
2021	0.182	0.322	0.264	0.295
2020	0.208	0.248	0.355	0.100
2019	0.226	0.267	0.272	0.230

wOBA by split, from pitch level data, 2015 on. For pitchers the split is the batter side faced.

Postseason batting

Year	G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS
2021	3	0	0	0	0	0	0	0	0	0	0
2020	2	0	0	0	0	0	0	0	0	0	0
Career	5	0	0	0	0	0	0	0	0	0	0

Postseason pitching

Year	L	ERA	G	IP	H	BB	SO	WHIP
2024	0	0.00	1	2.2	0	1	1	0.45
2021	1	8.10	3	3.3	5	1	7	1.80
2020	0	0.00	2	1.3	1	1	1	1.50
Career	1	3.93	6	6.9	6	3	9	1.31