Aaron Bummer or William Kempner

Baseball Stats Comparison

Stats
Projections
News & Notes
Schedule

Aaron Bummer or William Kempner Player Statistics
	Aaron Bummer RP - FA	William Kempner RP - MIA
2026 Stats


Games Played	21	9

Games Started	0	0

Innings Pitched	16.2	12.1

Wins	1	1

Losses	2	0

Saves	0	0

Blown Saves	0	0

Holds	5	0

Hits Allowed	24	8

Earned Runs	19	4

Home Runs Allowed	7	1

Strikeouts	13	14

Walks	11	4

ERA	10.26	2.92

WHIP	2.10	0.97

Aaron Bummer or William Kempner Player Projections
	Aaron Bummer RP - FA	William Kempner RP - MIA
2026 Projections


Games Played	55	21

Games Started	0	0

Innings Pitched	58.6	21.5

Wins	3	1

Losses	3	2

Saves	0	0

Blown Saves	0	0

Holds	9	1

Hits Allowed	55	20

Earned Runs	25	11

Home Runs Allowed	5	3

Strikeouts	61	21

Walks	22	12

ERA	3.88	4.71

WHIP	1.31	1.48

Aaron Bummer or William Kempner Player Notes
	Aaron Bummer RP - FA	William Kempner RP - MIA
News
	Aaron Bummer has elected free agency. Ari Koslow Fri, Aug 7th	The Marlins transferred William Kempner to the 60-day injured list. Ari Koslow Fri, Aug 21st
	The Royals optioned Aaron Bummer to Triple-A Omaha. Ari Koslow Fri, Aug 7th	William Kempner was scheduled to undergo surgery on Wednesday. Ari Koslow Thu, Aug 20th
	Aaron Bummer allowed three earned runs on two hits and a walk while recording one out in Thursday's loss to the Twins. Chase Davis Fri, Aug 7th	William Kempner is scheduled to undergo elbow surgery. Ari Koslow Wed, Aug 12th
	The Royals recalled LHP Aaron Bummer from Triple-A Omaha. Ari Koslow Sun, Aug 2nd	The Marlins say William Kempner will be re-evaluated next week. Ari Koslow Fri, Aug 7th
	The Royals signed Aaron Bummer to a minor league contract. Ari Koslow Mon, Jul 20th	William Kempner remains shut down from throwing. Ari Koslow Fri, Jul 17th
Notes
There are no recent notes for these players

Aaron Bummer or William Kempner Player Schedules
Date	Opp	Opp	Opp Pitcher	VBR
	Aaron Bummer RP - FA	William Kempner RP - MIA
Fri, Mar 27th		vs COL	Kyle Freeland (4-10)	#419
Sat, Mar 28th		vs COL	Michael Lorenzen (3-11)	#199
Sun, Mar 29th		vs COL	Jose Quintana (2-3)	#432
Mon, Mar 30th		vs CWS	Davis Martin (9-6)	#121
Tue, Mar 31st		vs CWS	Erick Fedde (7-8)	#239
Wed, Apr 1st		vs CWS	Shane Smith (0-2)	#259
Fri, Apr 3rd		@ NYY	Will Warren (8-6)	#57
Sat, Apr 4th		@ NYY	Ryan Weathers (5-8)	#233
Sun, Apr 5th		@ NYY	Max Fried (4-4)	#17
Mon, Apr 6th		vs CIN	Brandon Williamson (2-3)	#277
Tue, Apr 7th		vs CIN	Andrew Abbott (6-10)	#90
Wed, Apr 8th		vs CIN	Brady Singer (5-12)	#223
Thu, Apr 9th		vs CIN	Rhett Lowder (6-8)	#219
Fri, Apr 10th		@ DET	Keider Montero (9-8)	#148
Sat, Apr 11th		@ DET	Casey Mize (5-8)	#41
Sun, Apr 12th		@ DET	Tarik Skubal (8-7)	#2
Mon, Apr 13th		@ ATL	Grant Holmes (9-5)	#196
Tue, Apr 14th		@ ATL	Reynaldo Lopez (4-3)	#104
Wed, Apr 15th		@ ATL	Bryce Elder (8-7)	#187
Fri, Apr 17th		vs MIL	Coleman Crow (0-1)	#263
Sat, Apr 18th		vs MIL	Brandon Woodruff (2-2)
Sun, Apr 19th		vs MIL	Jacob Misiorowski (14-5)	#6
Mon, Apr 20th		vs STL	Michael McGreevy (5-9)	#122
Tue, Apr 21st		vs STL	Dustin May (6-8)	#44
Wed, Apr 22nd		vs STL	Kyle Leahy (10-4)	#96
Fri, Apr 24th		@ SF	Adrian Houser (4-7)	#328
Sat, Apr 25th		@ SF	Robbie Ray (11-7)	#83
Sun, Apr 26th		@ SF	Landen Roupp (8-13)	#74
Mon, Apr 27th		@ LAD	Yoshinobu Yamamoto (12-8)	#8
Tue, Apr 28th		@ LAD	Shohei Ohtani (8-2)	#1
Wed, Apr 29th		@ LAD	Tyler Glasnow (3-0)	#18
Fri, May 1st		vs PHI	Zack Wheeler (10-5)	#12
Sat, May 2nd		vs PHI	Andrew Painter (3-8)	#198
Sun, May 3rd		vs PHI	Jesus Luzardo (12-5)	#9
Mon, May 4th		vs PHI	Aaron Nola (5-10)	#47
Tue, May 5th		vs BAL	Chris Bassitt (5-4)	#110
Wed, May 6th		vs BAL	Brandon Young (9-3)	#167
Thu, May 7th		vs BAL	Cade Povich (2-1)	#288
Fri, May 8th		vs WSH	Foster Griffin (15-4)	#37
Sat, May 9th		vs WSH	Richard Lovelady (2-4)
Sun, May 10th		vs WSH	Cade Cavalli (12-5)	#61
Tue, May 12th		@ MIN	Bailey Ober (7-4)	#108
Wed, May 13th		@ MIN	Simeon Woods Richardson (2-7)	#358
Thu, May 14th		@ MIN	Zebby Matthews (8-8)	#105
Fri, May 15th		@ TB	Ian Seymour (9-5)	#66
Sat, May 16th		@ TB	Nick Martinez (13-4)	#71
Sun, May 17th		@ TB	Drew Rasmussen (14-5)	#15
Mon, May 18th		vs ATL	JR Ritchie (1-2)	#300
Tue, May 19th		vs ATL	Martin Perez (8-8)	#226
Wed, May 20th		vs ATL	Chris Sale (13-9)	#4
Thu, May 21st		vs ATL	Spencer Strider (4-2)	#315
Fri, May 22nd		vs NYM	Tobias Myers (0-2)	#152
Sat, May 23rd		vs NYM	Freddy Peralta (6-11)	#38
Sun, May 24th		vs NYM	Christian Scott (4-4)	#60
Mon, May 25th		@ TOR	Trey Yesavage (5-5)	#222
Tue, May 26th		@ TOR	Braydon Fisher (3-4)	#143
Wed, May 27th		@ TOR	Kevin Gausman (8-11)	#23
Fri, May 29th		@ NYM	Freddy Peralta (6-11)	#38
Sat, May 30th		@ NYM	Christian Scott (4-4)	#60
Sun, May 31st		@ NYM	Nolan McLean (10-8)	#33
Mon, Jun 1st		@ WSH	Cade Cavalli (12-5)	#61
Tue, Jun 2nd		@ WSH	Richard Lovelady (2-4)
Wed, Jun 3rd		@ WSH	Andrew Alvarez (2-6)	#144
Fri, Jun 5th		vs TB	Drew Rasmussen (14-5)	#15
Sat, Jun 6th		vs TB	Shane McClanahan (10-6)	#52
Sun, Jun 7th		vs TB	Griffin Jax (6-9)	#86
Tue, Jun 9th		vs ARI	Zac Gallen (3-9)	#177
Wed, Jun 10th		vs ARI	Ryne Nelson (3-5)	#132
Thu, Jun 11th		vs ARI	Merrill Kelly (9-12)	#129
Fri, Jun 12th		@ PIT	Braxton Ashcraft (13-5)	#31
Sat, Jun 13th		@ PIT	Bubba Chandler (6-9)	#116
Sun, Jun 14th		@ PIT	Paul Skenes (9-11)	#5
Mon, Jun 15th		@ PHI	Zack Wheeler (10-5)	#12
Tue, Jun 16th		@ PHI	Jesus Luzardo (12-5)	#9
Wed, Jun 17th		@ PHI	Andrew Painter (3-8)	#198
Fri, Jun 19th		vs SF	Landen Roupp (8-13)	#74
Sat, Jun 20th		vs SF	Trevor McDonald (3-7)
Sun, Jun 21st		vs SF	Logan Webb (8-8)	#21
Mon, Jun 22nd		vs TEX	Tyler Alexander (4-2)	#136
Tue, Jun 23rd		vs TEX	Cal Quantrill (6-5)	#197
Wed, Jun 24th		vs TEX	Jacob deGrom (9-9)	#7
Fri, Jun 26th		@ STL	Michael McGreevy (5-9)	#122
Sat, Jun 27th		@ STL	Andre Pallante (12-6)	#274
Sun, Jun 28th		@ STL	Kyle Leahy (10-4)	#96
Mon, Jun 29th		@ COL	Sean Sullivan (0-3)	#425
Tue, Jun 30th		@ COL	Tanner Gordon (1-4)	#413
Wed, Jul 1st		@ COL	Kyle Freeland (4-10)	#419
Thu, Jul 2nd		@ COL	Michael Lorenzen (3-11)	#199
Fri, Jul 3rd		@ ATH	Jack Perkins (3-10)	#138
Sat, Jul 4th		@ ATH	Aaron Civale (6-7)	#210
Sun, Jul 5th		@ ATH	Gage Jump (6-8)	#72
Tue, Jul 7th		vs SEA	Bryan Woo (9-9)	#11
Wed, Jul 8th		vs SEA	George Kirby (9-10)	#24
Thu, Jul 9th		vs SEA	Bryce Miller (4-8)	#73
Fri, Jul 10th		vs CLE	Parker Messick (10-8)	#32
Sat, Jul 11th		vs CLE	Tanner Bibee (5-14)	#46
Sun, Jul 12th		vs CLE	Joey Cantillo (9-7)	#79
Fri, Jul 17th		@ MIL	Logan Henderson (9-2)	#28
Sat, Jul 18th		@ MIL	Shane Drohan (7-5)	#115
Sun, Jul 19th		@ MIL	Robert Gasser (4-5)	#98
Mon, Jul 20th		@ HOU	Ronel Blanco (0-1)	#172
Tue, Jul 21st		@ HOU	Tatsuya Imai (6-4)	#126
Wed, Jul 22nd		@ HOU	Peter Lambert (8-7)	#164
Fri, Jul 24th		vs SD	German Marquez (4-2)	#423
Sat, Jul 25th		vs SD	Randy Vasquez (10-6)	#252
Sun, Jul 26th		vs SD	Walker Buehler (8-6)	#212
Mon, Jul 27th		vs PHI	Zack Wheeler (10-5)	#12
Tue, Jul 28th		vs PHI	Aaron Nola (5-10)	#47
Wed, Jul 29th		vs PHI	Jesus Luzardo (12-5)	#9
Thu, Jul 30th		@ NYM	Nolan McLean (10-8)	#33
Fri, Jul 31st		@ NYM	Kodai Senga (0-9)	#102
Sat, Aug 1st		@ NYM	Zac Thornton (3-4)	#137
Sun, Aug 2nd		@ NYM	Robert Stock (0-3)	#205
Tue, Aug 4th		@ ATL	Grant Holmes (9-5)	#196
Wed, Aug 5th		@ ATL	Bryce Elder (8-7)	#187
Thu, Aug 6th		@ ATL	Martin Perez (8-8)	#226
Fri, Aug 7th		vs LAA	George Klassen (2-2)	#230
Sat, Aug 8th		vs LAA	Walbert Urena (8-9)	#243
Sun, Aug 9th		vs LAA	Grayson Rodriguez (4-5)	#109
Tue, Aug 11th		vs PIT	Paul Skenes (9-11)	#5
Wed, Aug 12th		vs PIT	Carmen Mlodzinski (7-6)	#118
Thu, Aug 13th		vs PIT	Braxton Ashcraft (13-5)	#31
Fri, Aug 14th		@ CIN	Chase Burns (14-3)	#22
Sat, Aug 15th		@ CIN	Brady Singer (5-12)	#223
Sun, Aug 16th		@ CIN	Nick Lodolo (3-3)	#127
Mon, Aug 17th		@ PHI	Cristopher Sanchez (16-4)	#3
Tue, Aug 18th		@ PHI	Zack Wheeler (10-5)	#12
Wed, Aug 19th		@ PHI	Aaron Nola (5-10)	#47
Fri, Aug 21st		vs WSH	Brad Lord (5-2)	#161
Sat, Aug 22nd		vs WSH	Jake Irvin (2-8)	#195
Sun, Aug 23rd		vs WSH	Jackson Kent (1-2)	#186
Mon, Aug 24th		vs BOS	Ranger Suarez (5-3)	#30
Tue, Aug 25th		vs BOS	Payton Tolle (8-6)	#27
Wed, Aug 26th		vs BOS	Sonny Gray (16-4)	#25
Fri, Aug 28th		@ WSH	Jackson Kent (1-2)	#186
Sat, Aug 29th		@ WSH	Cade Cavalli (12-5)	#61
Sun, Aug 30th		@ WSH	Andrew Alvarez (2-6)	#144
Mon, Aug 31st		@ WSH	Will Dion (1-1)	#209
Tue, Sep 1st		@ KC	Randy Dobnak (2-2)	#433
Wed, Sep 2nd		@ KC	Noah Cameron (9-8)	#67
Thu, Sep 3rd		@ KC	Michael Wacha (8-8)	#69
Fri, Sep 4th		vs CHC	Shota Imanaga (8-9)	#29
Sat, Sep 5th		vs CHC	Clay Holmes (5-6)	#62
Sun, Sep 6th		vs CHC	Matthew Boyd (8-3)	#43
Mon, Sep 7th		vs NYM	Sean Manaea (4-6)	#58
Tue, Sep 8th		vs NYM	Christian Scott (4-4)	#60
Wed, Sep 9th		vs NYM
Fri, Sep 11th		vs LAD
Sat, Sep 12th		vs LAD
Sun, Sep 13th		vs LAD
Mon, Sep 14th		@ ARI
Tue, Sep 15th		@ ARI
Wed, Sep 16th		@ ARI
Fri, Sep 18th		@ SD
Sat, Sep 19th		@ SD
Sun, Sep 20th		@ SD
Tue, Sep 22nd		@ CHC
Wed, Sep 23rd		@ CHC
Thu, Sep 24th		@ CHC
Fri, Sep 25th		vs ATL
Sat, Sep 26th		vs ATL
Sun, Sep 27th		vs ATL