Mark Leiter Jr. or Welinton Herrera

Baseball Stats Comparison

Stats
Projections
News & Notes
Schedule

Mark Leiter Jr. or Welinton Herrera Player Statistics
	Mark Leiter Jr. RP - ATH	Welinton Herrera RP - COL
2026 Stats


Games Played	36	3

Games Started	0	0

Innings Pitched	33.2	2.1

Wins	0	0

Losses	1	0

Saves	4	0

Blown Saves	2	0

Holds	5	0

Hits Allowed	32	2

Earned Runs	16	0

Home Runs Allowed	2	0

Strikeouts	38	2

Walks	11	1

ERA	4.28	0.00

WHIP	1.28	1.29

Mark Leiter Jr. or Welinton Herrera Player Projections
	Mark Leiter Jr. RP - ATH	Welinton Herrera RP - COL
2026 Projections


Games Played	61	24

Games Started	0	0

Innings Pitched	59.9	24.0

Wins	4	1

Losses	4	2

Saves	5	0

Blown Saves	1	0

Holds	13	1

Hits Allowed	56	24

Earned Runs	29	12

Home Runs Allowed	8	3

Strikeouts	66	24

Walks	23	11

ERA	4.36	4.45

WHIP	1.33	1.43

Mark Leiter Jr. or Welinton Herrera Player Notes
	Mark Leiter Jr. RP - ATH	Welinton Herrera RP - COL
News
	The Athletics transferred Mark Leiter Jr. to the 60-day injured list. Ari Koslow Thu, Jul 30th	Welinton Herrera will undergo season-ending Tommy John surgery. Nicholas Rodriguez Tue, Jun 30th
	Mark Leiter Jr. underwent successful surgery on Tuesday. Ari Koslow Tue, Jul 28th	Welinton Herrera is receiving a second opinion on his UCL tear. Nicholas Rodriguez Sat, Jun 6th
	Athletics right-hander Mark Leiter Jr. (hip) is set to undergo surgery on Tuesday. Brenton Kemp Mon, Jul 27th	Welinton Herrera (elbow) has been transferred to the 60-day IL by the Colorado Rockies. The move allows an open spot on the 40-man roster for righthander TJ Shook, who was called up on Monday. David Leisering Mon, Jun 1st
	The Athletics placed Mark Leiter Jr. on the 15-day injured list with a right hip impingement. Ari Koslow Tue, Jul 21st	The Rockies placed Welinton Herrera on the 15-day injured list with left elbow inflammation. Ari Koslow Sat, May 30th
	The Athletics activated Mark Leiter Jr. from the injured list. Ari Koslow Fri, Jul 3rd	The Rockies recalled LHP Welinton Herrera from Triple-A Albuquerque. Ari Koslow Mon, May 25th
Notes
There are no recent notes for these players

Mark Leiter Jr. or Welinton Herrera Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	Mark Leiter Jr. RP - ATH			Welinton Herrera RP - COL
Fri, Mar 27th	@ TOR	Kevin Gausman (7-11)	#27	@ MIA	Sandy Alcantara (13-8)	#65
Sat, Mar 28th	@ TOR	Dylan Cease (9-5)	#8	@ MIA	Eury Perez (7-10)	#49
Sun, Mar 29th	@ TOR	Eric Lauer (8-6)	#230	@ MIA	Max Meyer (9-1)
Mon, Mar 30th	@ ATL	Bryce Elder (8-7)	#194	@ TOR	Cody Ponce (0-0)
Tue, Mar 31st	@ ATL	Jose Suarez	#310	@ TOR	Max Scherzer (1-7)	#164
Wed, Apr 1st	@ ATL	Chris Sale (13-9)	#4	@ TOR	Kevin Gausman (7-11)	#27
Fri, Apr 3rd	vs HOU	Cristian Javier (1-4)	#184	vs PHI	Aaron Nola (5-10)	#47
Sat, Apr 4th	vs HOU	Tatsuya Imai (6-4)	#129	vs PHI	Jesus Luzardo (12-5)	#9
Sun, Apr 5th	vs HOU	Lance McCullers Jr. (2-3)		vs PHI	Taijuan Walker (1-4)
Tue, Apr 7th	@ NYY	Cam Schlittler (12-6)	#14	vs HOU	Mike Burrows (4-9)	#193
Wed, Apr 8th	@ NYY	Will Warren (8-6)	#60	vs HOU	Cristian Javier (1-4)	#184
Thu, Apr 9th	@ NYY	Ryan Weathers (5-8)	#226	@ SD	Randy Vasquez (10-6)	#232
Fri, Apr 10th	@ NYM	Clay Holmes (5-6)	#58	@ SD	Walker Buehler (8-6)	#197
Sat, Apr 11th	@ NYM	Kodai Senga (0-9)	#91	@ SD	German Marquez (4-2)	#426
Sun, Apr 12th	@ NYM	Freddy Peralta (6-11)	#41	@ SD	Nick Pivetta (1-2)	#191
Mon, Apr 13th	vs TEX	Nathan Eovaldi (10-9)	#94
Tue, Apr 14th	vs TEX	MacKenzie Gore (7-10)	#35	@ HOU	Colton Gordon (0-0)	#291
Wed, Apr 15th	vs TEX	Kumar Rocker (5-10)	#118	@ HOU	Spencer Arrighetti (7-7)	#215
Thu, Apr 16th	vs TEX	Jack Leiter (3-7)	#125	@ HOU	Ryan Weiss (0-3)	#323
Fri, Apr 17th	vs CWS	Davis Martin (9-6)	#144	vs LAD	Tyler Glasnow (3-0)	#16
Sat, Apr 18th	vs CWS	Erick Fedde (6-8)	#267	vs LAD	Emmet Sheehan (4-8)	#110
Sun, Apr 19th	vs CWS	Noah Schultz (3-9)	#373	vs LAD	Roki Sasaki (5-5)	#131
Mon, Apr 20th	@ SEA	Emerson Hancock (7-8)	#64	vs LAD	Justin Wrobleski (11-5)	#133
Tue, Apr 21st	@ SEA	Luis Castillo (4-10)	#103	vs SD	Randy Vasquez (10-6)	#232
Wed, Apr 22nd	@ SEA	Logan Gilbert (11-7)	#12	vs SD	Walker Buehler (8-6)	#197
Fri, Apr 24th	@ TEX	Nathan Eovaldi (10-9)	#94	@ NYM	Freddy Peralta (6-11)	#41
Sat, Apr 25th	@ TEX	MacKenzie Gore (7-10)	#35
Sun, Apr 26th	@ TEX	Kumar Rocker (5-10)	#118	@ NYM	Kodai Senga (0-9)	#91
Tue, Apr 28th	vs KC	Kris Bubic (3-2)	#132	@ CIN	Chase Burns (14-3)	#22
Wed, Apr 29th	vs KC	Michael Wacha (8-8)	#78	@ CIN	Brandon Williamson (2-3)	#289
Thu, Apr 30th	vs KC	Noah Cameron (9-8)	#67	@ CIN	Andrew Abbott (6-9)	#99
Fri, May 1st	vs CLE	Joey Cantillo (9-7)	#59	vs ATL	Grant Holmes (9-5)	#205
Sat, May 2nd	vs CLE	Slade Cecconi (4-7)	#143	vs ATL	Chris Sale (13-9)	#4
Sun, May 3rd	vs CLE	Parker Messick (10-8)	#31	vs ATL	Spencer Strider (4-2)	#307
Tue, May 5th	@ PHI	Cristopher Sanchez (16-4)	#3
Wed, May 6th	@ PHI	Zack Wheeler (10-5)	#11	vs NYM	Freddy Peralta (6-11)	#41
Thu, May 7th	@ PHI	Andrew Painter (3-8)	#206	vs NYM	Christian Scott (4-4)	#56
Fri, May 8th	@ BAL	Kyle Bradish (7-12)	#50	@ PHI	Jesus Luzardo (12-5)	#9
Sat, May 9th	@ BAL	Shane Baz (4-14)	#66	@ PHI	Aaron Nola (5-10)	#47
Sun, May 10th	@ BAL	Keegan Akin (0-1)		@ PHI	Cristopher Sanchez (16-4)	#3
Tue, May 12th	vs STL	Andre Pallante (12-6)	#293	@ PIT	Paul Skenes (9-11)	#5
Wed, May 13th	vs STL	Matthew Liberatore (5-12)	#81	@ PIT	Mitch Keller (6-8)
Thu, May 14th	vs STL	Michael McGreevy (5-9)	#86	@ PIT	Mason Montgomery (5-3)	#76
Fri, May 15th	vs SF	Tyler Mahle (5-10)	#70	vs ARI	Merrill Kelly (8-12)	#120
Sat, May 16th	vs SF	Trevor McDonald (3-7)		vs ARI	Eduardo Rodriguez (14-4)	#88
Sun, May 17th	vs SF	Adrian Houser (4-7)	#365	vs ARI	Michael Soroka (8-4)	#104
Mon, May 18th	@ LAA	Walbert Urena (8-9)	#238	vs TEX	MacKenzie Gore (7-10)	#35
Tue, May 19th	@ LAA	Reid Detmers (4-8)	#43	vs TEX	Tyler Alexander (4-2)	#149
Wed, May 20th	@ LAA	Jack Kochanowicz (2-5)		vs TEX	Jack Leiter (3-7)	#125
Thu, May 21st	@ LAA	Jose Soriano (10-7)	#36	@ ARI	Eduardo Rodriguez (14-4)	#88
Fri, May 22nd	@ SD	Walker Buehler (8-6)	#197	@ ARI	Michael Soroka (8-4)	#104
Sat, May 23rd	@ SD	Lucas Giolito (2-3)	#348	@ ARI	Zac Gallen (3-9)	#177
Sun, May 24th	@ SD	Michael King (8-9)	#51	@ ARI	Ryne Nelson (3-5)	#134
Mon, May 25th	vs SEA	Luis Castillo (4-10)	#103	@ LAD	Emmet Sheehan (4-8)	#110
Tue, May 26th	vs SEA	Emerson Hancock (7-8)	#64	@ LAD	Eric Lauer (8-6)	#230
Wed, May 27th	vs SEA	Logan Gilbert (11-7)	#12	@ LAD	Shohei Ohtani (8-2)	#1
Fri, May 29th	vs NYY	Carlos Rodon (4-2)	#39	vs SF	Logan Webb (8-8)	#20
Sat, May 30th	vs NYY	Ryan Weathers (5-8)	#226	vs SF	Adrian Houser (4-7)	#365
Sun, May 31st	vs NYY	Will Warren (8-6)	#60	vs SF	Robbie Ray (11-7)	#87
Tue, Jun 2nd	@ CHC	Jameson Taillon (2-6)	#187	@ LAA	Grayson Rodriguez (4-5)	#113
Wed, Jun 3rd	@ CHC	Colin Rea (8-8)	#167	@ LAA	Walbert Urena (8-9)	#238
Thu, Jun 4th	@ CHC	Shota Imanaga (8-9)	#30
Fri, Jun 5th	@ HOU	Peter Lambert (8-7)	#172	vs MIL	Brandon Sproat (3-7)	#175
Sat, Jun 6th	@ HOU	Tatsuya Imai (6-4)	#129	vs MIL	Jacob Misiorowski (14-5)	#6
Sun, Jun 7th	@ HOU	Mike Burrows (4-9)	#193	vs MIL	Shane Drohan (6-5)	#136
Mon, Jun 8th	vs MIL	Kyle Harrison (10-3)	#57
Tue, Jun 9th	vs MIL	Robert Gasser (4-5)	#105	vs CHC	Colin Rea (8-8)	#167
Wed, Jun 10th	vs MIL	Brandon Sproat (3-7)	#175	vs CHC	Shota Imanaga (8-9)	#30
Fri, Jun 12th	vs COL	Sean Sullivan (0-3)	#425	@ ATH	Gage Jump (6-8)	#79
Sat, Jun 13th	vs COL	Kyle Freeland (4-10)	#414	@ ATH	Joey Estes (0-0)	#424
Sun, Jun 14th	vs COL	Tomoyuki Sugano (12-8)	#435	@ ATH	Jeffrey Springs (3-12)	#277
Mon, Jun 15th	vs PIT	Jared Jones (2-6)	#63	@ CHC	Shota Imanaga (8-9)	#30
Tue, Jun 16th	vs PIT	Mitch Keller (6-8)		@ CHC	Edward Cabrera (5-5)	#138
Wed, Jun 17th	vs PIT	Braxton Ashcraft (13-5)	#29	@ CHC	Javier Assad (6-1)	#178
Thu, Jun 18th	vs LAA	Ryan Johnson (3-7)	#213
Fri, Jun 19th	vs LAA	Jose Soriano (10-7)	#36	vs PIT	Bubba Chandler (6-9)	#122
Sat, Jun 20th	vs LAA	Walbert Urena (8-9)	#238	vs PIT	Paul Skenes (9-11)	#5
Sun, Jun 21st	vs LAA	Reid Detmers (4-8)	#43	vs PIT	Jared Jones (2-6)	#63
Tue, Jun 23rd	@ SF	Robbie Ray (11-7)	#87	vs BOS	Sonny Gray (16-4)	#28
Wed, Jun 24th	@ SF	Tyler Mahle (5-10)	#70	vs BOS	Ranger Suarez (5-3)	#25
Thu, Jun 25th	@ SF	Landen Roupp (8-13)	#74
Fri, Jun 26th	@ LAA	Walbert Urena (8-9)	#238	@ MIN	Taj Bradley (9-6)	#40
Sat, Jun 27th	@ LAA	Reid Detmers (4-8)	#43	@ MIN	Mike Paredes (0-3)	#386
Sun, Jun 28th	@ LAA	Sam Aldegheri (3-4)	#430	@ MIN	Connor Prielipp (3-7)	#90
Mon, Jun 29th	vs LAD	Eric Lauer (8-6)	#230	vs MIA	Sandy Alcantara (13-8)	#65
Tue, Jun 30th	vs LAD	Justin Wrobleski (11-5)	#133	vs MIA	Eury Perez (7-10)	#49
Wed, Jul 1st	vs LAD	Jack Dreyer (5-1)	#112	vs MIA	Max Meyer (9-1)
Fri, Jul 3rd	vs MIA	Tyler Phillips (3-6)	#229	vs SF	Logan Webb (8-8)	#20
Sat, Jul 4th	vs MIA	Sandy Alcantara (13-8)	#65	vs SF	Robbie Ray (11-7)	#87
Sun, Jul 5th	vs MIA	Eury Perez (7-10)	#49	vs SF	Tyler Mahle (5-10)	#70
Tue, Jul 7th	@ DET	Tarik Skubal (8-7)	#2	@ LAD	Justin Wrobleski (11-5)	#133
Wed, Jul 8th	@ DET	Troy Melton (7-3)	#54	@ LAD	Roki Sasaki (5-5)	#131
Thu, Jul 9th	@ DET	Framber Valdez (8-9)	#44	@ SF	Carson Whisenhunt (3-4)
Fri, Jul 10th	@ CWS	Sean Burke (7-6)	#84	@ SF	Robbie Ray (11-7)	#87
Sat, Jul 11th	@ CWS	Bryan Hudson (4-4)	#117	@ SF	Tyler Mahle (5-10)	#70
Sun, Jul 12th	@ CWS	Noah Schultz (3-9)	#373	@ SF	Trevor McDonald (3-7)
Fri, Jul 17th	vs WSH	Cade Cavalli (12-5)	#61	vs CIN	Brady Singer (5-12)	#135
Sat, Jul 18th	vs WSH	Zack Littell (8-8)	#330	vs CIN	Rhett Lowder (6-8)	#234
Sun, Jul 19th	vs WSH	Foster Griffin (15-4)	#37	vs CIN	Hunter Greene (2-2)
Mon, Jul 20th	@ ARI	Mitch Bratt (1-2)	#313	vs WSH	Andrew Alvarez (2-6)	#139
Tue, Jul 21st	@ ARI	Kohl Drake (0-1)	#347	vs WSH	Carson Palmquist (0-2)	#355
Wed, Jul 22nd	@ ARI	Merrill Kelly (8-12)	#120	vs WSH	Cade Cavalli (12-5)	#61
Fri, Jul 24th	@ MIN	Zebby Matthews (8-8)	#115	@ MIL	Shane Drohan (6-5)	#136
Sat, Jul 25th	@ MIN	Kendry Rojas (1-1)	#225	@ MIL	Robert Gasser (4-5)	#105
Sun, Jul 26th	@ MIN	Connor Prielipp (3-7)	#90	@ MIL	Jacob Misiorowski (14-5)	#6
Mon, Jul 27th	vs BOS	Payton Tolle (8-6)	#26
Tue, Jul 28th	vs BOS	Jake Bennett (8-6)	#98	@ SD	Michael King (8-9)	#51
Wed, Jul 29th	vs BOS	Patrick Sandoval (1-3)	#127	@ SD	Kyle Hart (0-3)	#153
Thu, Jul 30th	vs BOS	Sonny Gray (16-4)	#28
Fri, Jul 31st	vs DET	Tyler Holton (1-5)	#92	vs KC	Michael Wacha (8-8)	#78
Sat, Aug 1st	vs DET	Framber Valdez (8-9)	#44	vs KC	Luinder Avila (5-4)
Sun, Aug 2nd	vs DET	Keider Montero (9-8)	#171	vs KC	Seth Lugo (6-7)	#102
Tue, Aug 4th	@ CIN	Brady Singer (5-12)	#135	vs TB	Freddy Peralta (6-11)	#41
Wed, Aug 5th	@ CIN	Rhett Lowder (6-8)	#234	vs TB	Nick Martinez (13-4)	#73
Thu, Aug 6th	@ CIN	Andrew Abbott (6-9)	#99
Fri, Aug 7th	@ BOS	Payton Tolle (8-6)	#26	@ STL	Kyle Leahy (10-4)	#100
Sat, Aug 8th	@ BOS	Jake Bennett (8-6)	#98	@ STL	Matthew Liberatore (5-12)	#81
Sun, Aug 9th	@ BOS	Erik Miller		@ STL	Michael McGreevy (5-9)	#86
Mon, Aug 10th	vs TB	Freddy Peralta (6-11)	#41	@ ARI	Michael Soroka (8-4)	#104
Tue, Aug 11th	vs TB	Nick Martinez (13-4)	#73	@ ARI	Mitch Bratt (1-2)	#313
Wed, Aug 12th	vs TB	Drew Rasmussen (14-5)	#13	@ ARI	Merrill Kelly (8-12)	#120
Fri, Aug 14th	vs TEX	Kumar Rocker (5-10)	#118	@ SF	Landen Roupp (8-13)	#74
Sat, Aug 15th	vs TEX	MacKenzie Gore (7-10)	#35	@ SF	Logan Webb (8-8)	#20
Sun, Aug 16th	vs TEX	Cody Bradford (0-3)	#97	@ SF	Blade Tidwell (0-1)	#179
Mon, Aug 17th	@ KC	Michael Wacha (8-8)	#78	vs LAD	Blake Snell (2-1)	#17
Tue, Aug 18th	@ KC	Daniel Lynch (4-4)	#201	vs LAD	Eric Lauer (8-6)	#230
Wed, Aug 19th	@ KC	Seth Lugo (6-7)	#102	vs LAD	Roki Sasaki (5-5)	#131
Thu, Aug 20th	@ KC	Randy Dobnak (2-2)	#432
Fri, Aug 21st	@ HOU	Hayden Wesneski (4-1)	#72	vs CLE	Joey Cantillo (9-7)	#59
Sat, Aug 22nd	@ HOU	Hunter Brown (4-3)	#24	vs CLE	Tanner Bibee (5-14)	#52
Sun, Aug 23rd	@ HOU	Cristian Javier (1-4)	#184	vs CLE	Foster Griffin (15-4)	#37
Mon, Aug 24th	vs MIN	Zebby Matthews (8-8)	#115	@ WSH	Cade Cavalli (12-5)	#61
Tue, Aug 25th	vs MIN	Taj Bradley (9-6)	#40	@ WSH	Andrew Alvarez (2-6)	#139
Wed, Aug 26th	vs MIN	Connor Prielipp (3-7)	#90	@ WSH	Matt Waldron (1-2)	#212
Fri, Aug 28th	vs BAL	Brandon Young (9-3)	#165	@ ATL	Grant Holmes (9-5)	#205
Sat, Aug 29th	vs BAL	Shane Baz (4-14)	#66	@ ATL	Martin Perez (8-8)	#228
Sun, Aug 30th	vs BAL	Chris Bassitt (5-4)	#128	@ ATL	Tyler Mahle (5-10)	#70
Mon, Aug 31st	@ TEX	Jacob deGrom (9-9)	#7	vs BAL	Kyle Bradish (7-12)	#50
Tue, Sep 1st	@ TEX	MacKenzie Gore (7-10)	#35	vs BAL	Trevor Rogers (9-9)	#55
Wed, Sep 2nd	@ TEX	Cody Bradford (0-3)	#97	vs BAL	Brandon Young (9-3)	#165
Thu, Sep 3rd	@ SEA	Kade Anderson (0-0)	#68
Fri, Sep 4th	@ SEA	Logan Gilbert (11-7)	#12	vs STL	Kyle Leahy (10-4)	#100
Sat, Sep 5th	@ SEA	Bryce Miller (4-8)	#42	vs STL	Matthew Liberatore (5-12)	#81
Sun, Sep 6th	@ SEA	Bryan Woo (9-9)	#15	vs STL	Michael McGreevy (5-9)	#86
Mon, Sep 7th	vs TOR	Dylan Cease (9-5)	#8
Tue, Sep 8th	vs TOR			@ NYY
Wed, Sep 9th	vs TOR			@ NYY
Fri, Sep 11th	vs SEA			@ DET
Sat, Sep 12th	vs SEA			@ DET
Sun, Sep 13th	vs SEA			@ DET
Tue, Sep 15th	@ TB			vs SD
Wed, Sep 16th	@ TB			vs SD
Thu, Sep 17th	@ TB			vs SD
Fri, Sep 18th	@ CLE			vs SEA
Sat, Sep 19th	@ CLE			vs SEA
Sun, Sep 20th	@ CLE			vs SEA
Tue, Sep 22nd	vs LAA			vs ARI
Wed, Sep 23rd	vs LAA			vs ARI
Thu, Sep 24th	vs HOU			vs ARI
Fri, Sep 25th	vs HOU			@ CWS
Sat, Sep 26th	vs HOU			@ CWS
Sun, Sep 27th	vs HOU			@ CWS
Mon, Apr 6th				vs HOU	Cody Bolton (0-1)	#406
Thu, Apr 23rd				vs SD	Matt Waldron (1-2)	#212
Mon, May 4th				vs NYM	Huascar Brazoban (5-2)	#263
Mon, Jun 1st				@ LAA	Jose Soriano (10-7)	#36
Thu, Jun 11th				vs CHC	Edward Cabrera (5-5)	#138
Mon, Jun 22nd				vs BOS	Jake Bennett (8-6)	#98
Thu, Jul 2nd				vs MIA	Ryan Gusto (1-3)	#168
Mon, Jul 6th				@ LAD	Eric Lauer (8-6)	#230
Mon, Aug 3rd				vs TB	Ian Seymour (9-5)	#71
Thu, Aug 27th				@ WSH	Jake Irvin (2-8)	#195
Thu, Sep 10th				@ NYY
Mon, Sep 14th				vs SD