Who Should I Trade?

Mark Leiter Jr. for William Kempner (2026)

Summary
Stats
Projections
News & Notes
Schedule

Who Should I Trade? Player Summaries
	Experts' Pick
	Mark Leiter Jr. RP - ATH	William Kempner RP - MIA
Expert Recommendation	100% Recommended by 2 of 2 experts	0% Recommended by 0 of 2 experts
Rankings

Rest of Season	# 278	‐
VBR	‐	# 875

Projections

Strikeouts	‐	8
Wins	‐	0
Saves	‐	0
ERA	‐	3.99
WHIP	‐	1.49

Misc

Injury Alert	IL60	IL15

Expert Ranks

Kelly Kirby FantasyPros	# 246	# 392

Kevin Spinelli KevScores	# 299	‐

Who Should I Trade? Player Statistics
	Mark Leiter Jr. RP - ATH	William Kempner RP - MIA
2026 Stats


Games Played	36	9

Games Started	0	0

Innings Pitched	33.2	12.1

Wins	0	1

Losses	1	0

Saves	4	0

Blown Saves	2	0

Holds	5	0

Hits Allowed	32	8

Earned Runs	16	4

Home Runs Allowed	2	1

Strikeouts	38	14

Walks	11	4

ERA	4.28	2.92

WHIP	1.28	0.97

Who Should I Trade? Player Projections
	Mark Leiter Jr. RP - ATH	William Kempner RP - MIA
2026 Projections


Games Played	‐	10

Games Started	‐	0

Innings Pitched	‐	7.4

Wins	‐	0

Losses	‐	0

Saves	‐	0

Blown Saves	‐	0

Holds	‐	0

Hits Allowed	‐	6

Earned Runs	‐	3

Home Runs Allowed	‐	1

Strikeouts	‐	8

Walks	‐	4

ERA	‐	3.99

WHIP	‐	1.49

Who Should I Trade? Player Notes
	Mark Leiter Jr. RP - ATH	William Kempner RP - MIA
News
	The Athletics transferred Mark Leiter Jr. to the 60-day injured list. Ari Koslow Thu, Jul 30th	William Kempner remains shut down from throwing. Ari Koslow Fri, Jul 17th
	Mark Leiter Jr. underwent successful surgery on Tuesday. Ari Koslow Tue, Jul 28th	The Miami Marlins placed William Kempner on the 15-day injured list on Sunday due to a right elbow sprain. Nicholas Rodriguez Sun, Jul 12th
	Athletics right-hander Mark Leiter Jr. (hip) is set to undergo surgery on Tuesday. Brenton Kemp Mon, Jul 27th	The Marlins recalled William Kempner from Triple-A Jacksonville. Ari Koslow Fri, Jul 3rd
	The Athletics placed Mark Leiter Jr. on the 15-day injured list with a right hip impingement. Ari Koslow Tue, Jul 21st	The Marlins optioned RHP Will Kempner to Triple-A Jacksonville. Ari Koslow Tue, Jun 16th
	The Athletics activated Mark Leiter Jr. from the injured list. Ari Koslow Fri, Jul 3rd	The Marlins recalled RHP William Kempner from Triple-A Jacksoville. Ari Koslow Sat, May 30th
Notes
There are no recent notes for these players

Who Should I Trade? Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	Mark Leiter Jr. RP - ATH			William Kempner RP - MIA
Fri, Mar 27th	@ TOR	Kevin Gausman (4-10)	#30	vs COL	Kyle Freeland (2-10)	#375
Sat, Mar 28th	@ TOR	Dylan Cease (7-5)	#9	vs COL	Michael Lorenzen (3-9)	#433
Sun, Mar 29th	@ TOR	Eric Lauer (6-5)	#370	vs COL	Jose Quintana (2-3)	#430
Mon, Mar 30th	@ ATL	Bryce Elder (6-6)	#133	vs CWS	Davis Martin (9-5)	#82
Tue, Mar 31st	@ ATL	Jose Suarez	#184	vs CWS	Erick Fedde (5-6)	#385
Wed, Apr 1st	@ ATL	Chris Sale (12-6)	#5	vs CWS	Shane Smith (0-2)	#194
Fri, Apr 3rd	vs HOU	Cristian Javier (1-1)	#179	@ NYY	Will Warren (7-5)	#68
Sat, Apr 4th	vs HOU	Tatsuya Imai (6-4)	#151	@ NYY	Ryan Weathers (4-7)	#57
Sun, Apr 5th	vs HOU	Lance McCullers Jr. (2-3)	#290	@ NYY	Max Fried (4-3)	#15
Tue, Apr 7th	@ NYY	Cam Schlittler (10-6)	#14	vs CIN	Andrew Abbott (5-6)	#108
Wed, Apr 8th	@ NYY	Will Warren (7-5)	#68	vs CIN	Brady Singer (5-10)	#142
Thu, Apr 9th	@ NYY	Ryan Weathers (4-7)	#57	vs CIN	Rhett Lowder (3-7)	#287
Fri, Apr 10th	@ NYM	Clay Holmes (4-4)	#116	@ DET	Keider Montero (7-6)	#144
Sat, Apr 11th	@ NYM	Kodai Senga (0-7)	#187	@ DET	Casey Mize (4-6)	#46
Sun, Apr 12th	@ NYM	Freddy Peralta (5-9)	#38	@ DET	Tarik Skubal (7-5)	#2
Mon, Apr 13th	vs TEX	Nathan Eovaldi (10-8)	#17	@ ATL	Grant Holmes (6-4)	#137
Tue, Apr 14th	vs TEX	MacKenzie Gore (6-9)	#37	@ ATL	Reynaldo Lopez (4-3)	#84
Wed, Apr 15th	vs TEX	Kumar Rocker (4-8)	#88	@ ATL	Bryce Elder (6-6)	#133
Thu, Apr 16th	vs TEX	Jack Leiter (3-7)	#123
Fri, Apr 17th	vs CWS	Davis Martin (9-5)	#82	vs MIL	Coleman Crow (0-1)	#226
Sat, Apr 18th	vs CWS	Erick Fedde (5-6)	#385	vs MIL	Brandon Woodruff (2-2)
Sun, Apr 19th	vs CWS	Noah Schultz (3-7)	#209	vs MIL	Jacob Misiorowski (11-4)	#6
Mon, Apr 20th	@ SEA	Emerson Hancock (6-5)	#85	vs STL	Michael McGreevy (4-9)	#87
Tue, Apr 21st	@ SEA	Luis Castillo (3-9)	#64	vs STL	Dustin May (5-7)	#55
Wed, Apr 22nd	@ SEA	Logan Gilbert (8-6)	#10	vs STL	Kyle Leahy (7-4)	#103
Fri, Apr 24th	@ TEX	Nathan Eovaldi (10-8)	#17	@ SF	Adrian Houser (2-7)	#188
Sat, Apr 25th	@ TEX	MacKenzie Gore (6-9)	#37	@ SF	Robbie Ray (10-6)	#102
Sun, Apr 26th	@ TEX	Kumar Rocker (4-8)	#88	@ SF	Landen Roupp (7-9)	#61
Tue, Apr 28th	vs KC	Kris Bubic (3-2)	#114	@ LAD	Shohei Ohtani (8-2)	#1
Wed, Apr 29th	vs KC	Michael Wacha (5-7)	#78	@ LAD	Tyler Glasnow (3-0)	#62
Thu, Apr 30th	vs KC	Noah Cameron (5-8)	#94
Fri, May 1st	vs CLE	Joey Cantillo (8-6)	#76	vs PHI	Zack Wheeler (10-2)	#8
Sat, May 2nd	vs CLE	Slade Cecconi (4-7)	#132	vs PHI	Andrew Painter (1-8)	#215
Sun, May 3rd	vs CLE	Parker Messick (8-6)	#45	vs PHI	Jesus Luzardo (9-5)	#12
Tue, May 5th	@ PHI	Cristopher Sanchez (13-4)	#4	vs BAL	Chris Bassitt (4-4)	#261
Wed, May 6th	@ PHI	Zack Wheeler (10-2)	#8	vs BAL	Brandon Young (8-2)	#134
Thu, May 7th	@ PHI	Andrew Painter (1-8)	#215	vs BAL	Cade Povich (1-1)	#223
Fri, May 8th	@ BAL	Kyle Bradish (7-9)	#49	vs WSH	Foster Griffin (12-2)	#51
Sat, May 9th	@ BAL	Shane Baz (4-9)	#73	vs WSH	Richard Lovelady (2-4)	#392
Sun, May 10th	@ BAL	Keegan Akin (0-1)		vs WSH	Cade Cavalli (8-4)	#52
Tue, May 12th	vs STL	Andre Pallante (11-6)	#115	@ MIN	Bailey Ober (7-3)	#83
Wed, May 13th	vs STL	Matthew Liberatore (5-8)	#125	@ MIN	Simeon Woods Richardson (1-7)
Thu, May 14th	vs STL	Michael McGreevy (4-9)	#87	@ MIN	Zebby Matthews (4-8)	#104
Fri, May 15th	vs SF	Tyler Mahle (3-9)	#74	@ TB	Ian Seymour (7-3)	#86
Sat, May 16th	vs SF	Trevor McDonald (3-7)	#278	@ TB	Nick Martinez (10-2)	#95
Sun, May 17th	vs SF	Adrian Houser (2-7)	#188	@ TB	Drew Rasmussen (9-5)	#20
Mon, May 18th	@ LAA	Walbert Urena (6-7)	#318	vs ATL	JR Ritchie (1-2)	#284
Tue, May 19th	@ LAA	Reid Detmers (3-7)	#36	vs ATL	Martin Perez (6-6)	#224
Wed, May 20th	@ LAA	Jack Kochanowicz (2-5)		vs ATL	Chris Sale (12-6)	#5
Thu, May 21st	@ LAA	Jose Soriano (9-6)	#53	vs ATL	Spencer Strider (4-2)	#303
Fri, May 22nd	@ SD	Walker Buehler (6-5)	#217	vs NYM	Tobias Myers (0-2)	#206
Sat, May 23rd	@ SD	Lucas Giolito (2-3)	#337	vs NYM	Freddy Peralta (5-9)	#38
Sun, May 24th	@ SD	Michael King (6-7)	#58	vs NYM	Christian Scott (3-3)	#54
Mon, May 25th	vs SEA	Luis Castillo (3-9)	#64	@ TOR	Trey Yesavage (5-5)	#69
Tue, May 26th	vs SEA	Emerson Hancock (6-5)	#85	@ TOR	Braydon Fisher (3-3)	#178
Wed, May 27th	vs SEA	Logan Gilbert (8-6)	#10	@ TOR	Kevin Gausman (4-10)	#30
Fri, May 29th	vs NYY	Carlos Rodon (4-2)	#105	@ NYM	Freddy Peralta (5-9)	#38
Sat, May 30th	vs NYY	Ryan Weathers (4-7)	#57	@ NYM	Christian Scott (3-3)	#54
Sun, May 31st	vs NYY	Will Warren (7-5)	#68	@ NYM	Nolan McLean (7-7)	#28
Tue, Jun 2nd	@ CHC	Jameson Taillon (2-6)	#171	@ WSH	Richard Lovelady (2-4)	#392
Wed, Jun 3rd	@ CHC	Colin Rea (8-7)	#176	@ WSH	Andrew Alvarez (2-3)	#192
Thu, Jun 4th	@ CHC	Shota Imanaga (7-8)	#25
Fri, Jun 5th	@ HOU	Peter Lambert (8-5)	#148	vs TB	Drew Rasmussen (9-5)	#20
Sat, Jun 6th	@ HOU	Tatsuya Imai (6-4)	#151	vs TB	Shane McClanahan (9-6)	#35
Sun, Jun 7th	@ HOU	Mike Burrows (4-9)	#227	vs TB	Griffin Jax (6-8)	#60
Mon, Jun 8th	vs MIL	Kyle Harrison (8-2)	#47
Tue, Jun 9th	vs MIL	Robert Gasser (3-4)	#112	vs ARI	Zac Gallen (3-9)	#177
Wed, Jun 10th	vs MIL	Brandon Sproat (3-6)	#141	vs ARI	Ryne Nelson (3-5)	#199
Fri, Jun 12th	vs COL	Sean Sullivan (0-3)	#427	@ PIT	Braxton Ashcraft (10-4)	#33
Sat, Jun 13th	vs COL	Kyle Freeland (2-10)	#375	@ PIT	Bubba Chandler (3-8)	#106
Sun, Jun 14th	vs COL	Tomoyuki Sugano (10-4)	#434	@ PIT	Paul Skenes (9-9)	#3
Mon, Jun 15th	vs PIT	Jared Jones (2-2)	#40	@ PHI	Zack Wheeler (10-2)	#8
Tue, Jun 16th	vs PIT	Mitch Keller (6-7)	#121	@ PHI	Jesus Luzardo (9-5)	#12
Wed, Jun 17th	vs PIT	Braxton Ashcraft (10-4)	#33	@ PHI	Andrew Painter (1-8)	#215
Thu, Jun 18th	vs LAA	Ryan Johnson (2-5)	#169
Fri, Jun 19th	vs LAA	Jose Soriano (9-6)	#53	vs SF	Landen Roupp (7-9)	#61
Sat, Jun 20th	vs LAA	Walbert Urena (6-7)	#318	vs SF	Trevor McDonald (3-7)	#278
Sun, Jun 21st	vs LAA	Reid Detmers (3-7)	#36	vs SF	Logan Webb (6-7)	#16
Tue, Jun 23rd	@ SF	Robbie Ray (10-6)	#102	vs TEX	Cal Quantrill (4-3)	#292
Wed, Jun 24th	@ SF	Tyler Mahle (3-9)	#74	vs TEX	Jacob deGrom (7-6)	#7
Thu, Jun 25th	@ SF	Landen Roupp (7-9)	#61
Fri, Jun 26th	@ LAA	Walbert Urena (6-7)	#318	@ STL	Michael McGreevy (4-9)	#87
Sat, Jun 27th	@ LAA	Reid Detmers (3-7)	#36	@ STL	Andre Pallante (11-6)	#115
Sun, Jun 28th	@ LAA	Sam Aldegheri (3-4)	#426	@ STL	Kyle Leahy (7-4)	#103
Mon, Jun 29th	vs LAD	Eric Lauer (6-5)	#370	@ COL	Sean Sullivan (0-3)	#427
Tue, Jun 30th	vs LAD	Justin Wrobleski (11-2)	#90	@ COL	Tanner Gordon (0-2)	#424
Wed, Jul 1st	vs LAD	Jack Dreyer (4-1)	#154	@ COL	Kyle Freeland (2-10)	#375
Fri, Jul 3rd	vs MIA	Tyler Phillips (2-5)	#285	@ ATH	Jack Perkins (2-6)	#101
Sat, Jul 4th	vs MIA	Sandy Alcantara (11-6)	#65	@ ATH	Aaron Civale (5-7)	#190
Sun, Jul 5th	vs MIA	Eury Perez (5-8)	#42	@ ATH	Gage Jump (4-6)	#93
Tue, Jul 7th	@ DET	Tarik Skubal (7-5)	#2	vs SEA	Bryan Woo (7-8)	#13
Wed, Jul 8th	@ DET	Troy Melton (6-1)	#96	vs SEA	George Kirby (8-9)	#22
Thu, Jul 9th	@ DET	Framber Valdez (5-7)	#34	vs SEA	Bryce Miller (4-5)	#39
Fri, Jul 10th	@ CWS	Sean Burke (7-5)	#71	vs CLE	Parker Messick (8-6)	#45
Sat, Jul 11th	@ CWS	Bryan Hudson (3-4)	#168	vs CLE	Tanner Bibee (4-10)	#56
Sun, Jul 12th	@ CWS	Noah Schultz (3-7)	#209	vs CLE	Joey Cantillo (8-6)	#76
Fri, Jul 17th	vs WSH	Cade Cavalli (8-4)	#52	@ MIL	Logan Henderson (5-1)	#41
Sat, Jul 18th	vs WSH	Zack Littell (7-8)	#201	@ MIL	Shane Drohan (5-4)	#75
Sun, Jul 19th	vs WSH	Foster Griffin (12-2)	#51	@ MIL	Robert Gasser (3-4)	#112
Mon, Jul 20th	@ ARI	Mitch Bratt (0-1)	#195	@ HOU	Ronel Blanco (0-1)	#130
Tue, Jul 21st	@ ARI	Kohl Drake (0-0)	#297	@ HOU	Tatsuya Imai (6-4)	#151
Wed, Jul 22nd	@ ARI	Merrill Kelly (8-8)	#126	@ HOU	Peter Lambert (8-5)	#148
Fri, Jul 24th	@ MIN	Zebby Matthews (4-8)	#104	vs SD	German Marquez (4-2)	#357
Sat, Jul 25th	@ MIN	Kendry Rojas (1-1)	#160	vs SD	Randy Vasquez (6-6)	#257
Sun, Jul 26th	@ MIN	Connor Prielipp (3-5)	#98	vs SD	Walker Buehler (6-5)	#217
Mon, Jul 27th	vs BOS	Payton Tolle (6-6)	#44	vs PHI	Zack Wheeler (10-2)	#8
Tue, Jul 28th	vs BOS	Jake Bennett (6-4)	#89	vs PHI	Aaron Nola (3-9)	#59
Wed, Jul 29th	vs BOS	Patrick Sandoval (0-0)	#138	vs PHI	Jesus Luzardo (9-5)	#12
Thu, Jul 30th	vs BOS	Sonny Gray (13-2)	#29	@ NYM	Nolan McLean (7-7)	#28
Fri, Jul 31st	vs DET	Casey Mize (4-6)	#46	@ NYM	Freddy Peralta (5-9)	#38
Sat, Aug 1st	vs DET	Framber Valdez (5-7)	#34	@ NYM	Zac Thornton (2-1)	#146
Sun, Aug 2nd	vs DET	Keider Montero (7-6)	#144	@ NYM	Clay Holmes (4-4)	#116
Tue, Aug 4th	@ CIN	Brady Singer (5-10)	#142	@ ATL	Chris Sale (12-6)	#5
Wed, Aug 5th	@ CIN	Rhett Lowder (3-7)	#287	@ ATL	Grant Holmes (6-4)	#137
Thu, Aug 6th	@ CIN	Hunter Greene (2-2)	#26	@ ATL	Bryce Elder (6-6)	#133
Fri, Aug 7th	@ BOS	Payton Tolle (6-6)	#44	vs LAA	Jose Soriano (9-6)	#53
Sat, Aug 8th	@ BOS	Jake Bennett (6-4)	#89	vs LAA	Walbert Urena (6-7)	#318
Sun, Aug 9th	@ BOS	Patrick Sandoval (0-0)	#138	vs LAA	Reid Detmers (3-7)	#36
Mon, Aug 10th	vs TB
Tue, Aug 11th	vs TB			vs PIT
Wed, Aug 12th	vs TB			vs PIT
Fri, Aug 14th	vs TEX			@ CIN
Sat, Aug 15th	vs TEX			@ CIN
Sun, Aug 16th	vs TEX			@ CIN
Mon, Aug 17th	@ KC			@ PHI
Tue, Aug 18th	@ KC			@ PHI
Wed, Aug 19th	@ KC			@ PHI
Thu, Aug 20th	@ KC
Fri, Aug 21st	@ HOU			vs WSH
Sat, Aug 22nd	@ HOU			vs WSH
Sun, Aug 23rd	@ HOU			vs WSH
Mon, Aug 24th	vs MIN			vs BOS
Tue, Aug 25th	vs MIN			vs BOS
Wed, Aug 26th	vs MIN			vs BOS
Fri, Aug 28th	vs BAL			@ WSH
Sat, Aug 29th	vs BAL			@ WSH
Sun, Aug 30th	vs BAL			@ WSH
Mon, Aug 31st	@ TEX			@ WSH
Tue, Sep 1st	@ TEX			@ KC
Wed, Sep 2nd	@ TEX			@ KC
Thu, Sep 3rd	@ SEA			@ KC
Fri, Sep 4th	@ SEA			vs CHC
Sat, Sep 5th	@ SEA			vs CHC
Sun, Sep 6th	@ SEA			vs CHC
Mon, Sep 7th	vs TOR			vs NYM
Tue, Sep 8th	vs TOR			vs NYM
Wed, Sep 9th	vs TOR			vs NYM
Fri, Sep 11th	vs SEA			vs LAD
Sat, Sep 12th	vs SEA			vs LAD
Sun, Sep 13th	vs SEA			vs LAD
Tue, Sep 15th	@ TB			@ ARI
Wed, Sep 16th	@ TB			@ ARI
Thu, Sep 17th	@ TB
Fri, Sep 18th	@ CLE			@ SD
Sat, Sep 19th	@ CLE			@ SD
Sun, Sep 20th	@ CLE			@ SD
Tue, Sep 22nd	vs LAA			@ CHC
Wed, Sep 23rd	vs LAA			@ CHC
Thu, Sep 24th	vs HOU			@ CHC
Fri, Sep 25th	vs HOU			vs ATL
Sat, Sep 26th	vs HOU			vs ATL
Sun, Sep 27th	vs HOU			vs ATL
Mon, Apr 6th				vs CIN	Brandon Williamson (2-3)	#330
Mon, Apr 27th				@ LAD	Yoshinobu Yamamoto (11-6)	#11
Mon, May 4th				vs PHI	Aaron Nola (3-9)	#59
Mon, Jun 1st				@ WSH	Cade Cavalli (8-4)	#52
Thu, Jun 11th				vs ARI	Merrill Kelly (8-8)	#126
Mon, Jun 22nd				vs TEX	Tyler Alexander (1-1)	#157
Thu, Jul 2nd				@ COL	Michael Lorenzen (3-9)	#433
Thu, Aug 13th				vs PIT
Mon, Sep 14th				@ ARI

Who Should I Trade?

Mark Leiter Jr. for William Kempner (2026)

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