Who Should I Trade?

Isaac Mattson for Mark Leiter Jr. (2026)

Summary
Stats
Projections
News & Notes
Schedule

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

Rest of Season	# 285	# 392
VBR	‐	# 716

Projections

Strikeouts	‐	6
Wins	‐	0
Saves	‐	0
ERA	‐	4.09
WHIP	‐	1.36

Misc

Injury Alert	IL60	MiLB

Expert Ranks

Kelly Kirby FantasyPros	# 257	# 423

Kevin Spinelli KevScores	# 299	# 418

Who Should I Trade? Player Statistics
	Mark Leiter Jr. RP - ATH	Isaac Mattson RP - PIT
2026 Stats


Games Played	36	37

Games Started	0	0

Innings Pitched	33.2	36.2

Wins	0	0

Losses	1	0

Saves	4	0

Blown Saves	2	2

Holds	5	8

Hits Allowed	32	40

Earned Runs	16	20

Home Runs Allowed	2	3

Strikeouts	38	34

Walks	11	18

ERA	4.28	4.91

WHIP	1.28	1.58

Who Should I Trade? Player Projections
	Mark Leiter Jr. RP - ATH	Isaac Mattson RP - PIT
2026 Projections


Games Played	‐	9

Games Started	‐	0

Innings Pitched	‐	6.2

Wins	‐	0

Losses	‐	0

Saves	‐	0

Blown Saves	‐	0

Holds	‐	0

Hits Allowed	‐	6

Earned Runs	‐	3

Home Runs Allowed	‐	1

Strikeouts	‐	6

Walks	‐	3

ERA	‐	4.09

WHIP	‐	1.36

Who Should I Trade? Player Notes
	Mark Leiter Jr. RP - ATH	Isaac Mattson RP - PIT
News
	The Athletics transferred Mark Leiter Jr. to the 60-day injured list. Ari Koslow Thu, Jul 30th	The Pirates optioned Isaac Mattson to Triple-A Indianapolis. Ari Koslow Tue, Aug 18th
	Mark Leiter Jr. underwent successful surgery on Tuesday. Ari Koslow Tue, Jul 28th	The Pirates recalled RHP Isaac Mattson from Triple-A Indianapolis. Ari Koslow Thu, Aug 13th
	Athletics right-hander Mark Leiter Jr. (hip) is set to undergo surgery on Tuesday. Brenton Kemp Mon, Jul 27th	The Pirates optioned RHP Isaac Mattson to Triple-A Indianapolis. Ari Koslow Sun, Aug 2nd
	The Athletics placed Mark Leiter Jr. on the 15-day injured list with a right hip impingement. Ari Koslow Tue, Jul 21st	The Pirates recalled RHP Isaac Mattson from Triple-A Indianapolis. Ari Koslow Sat, Aug 1st
	The Athletics activated Mark Leiter Jr. from the injured list. Ari Koslow Fri, Jul 3rd	The Pirates optioned RHP Isaac Mattson to Triple-A Indianapolis. Ari Koslow Wed, Jul 29th
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			Isaac Mattson RP - PIT
Thu, Mar 26th				@ NYM	Freddy Peralta (6-11)	#38
Sat, Mar 28th	@ TOR	Dylan Cease (9-5)	#10	@ NYM	David Peterson (7-7)	#75
Sun, Mar 29th	@ TOR	Eric Lauer (8-6)	#227	@ NYM	Nolan McLean (10-8)	#33
Mon, Mar 30th	@ ATL	Bryce Elder (8-7)	#187	@ CIN	Chase Burns (14-3)	#22
Tue, Mar 31st	@ ATL	Jose Suarez	#208	@ CIN	Brandon Williamson (2-3)	#277
Wed, Apr 1st	@ ATL	Chris Sale (13-9)	#4	@ CIN	Andrew Abbott (6-10)	#90
Fri, Apr 3rd	vs HOU	Cristian Javier (1-5)	#158	vs BAL	Kyle Bradish (7-12)	#53
Sat, Apr 4th	vs HOU	Tatsuya Imai (6-4)	#126	vs BAL	Shane Baz (5-14)	#64
Sun, Apr 5th	vs HOU	Lance McCullers Jr. (2-3)		vs BAL	Chris Bassitt (5-4)	#110
Mon, Apr 6th				vs SD	German Marquez (4-2)	#423
Tue, Apr 7th	@ NYY	Cam Schlittler (12-6)	#14	vs SD	Nick Pivetta (1-2)	#192
Wed, Apr 8th	@ NYY	Will Warren (8-6)	#57	vs SD	Michael King (8-9)	#55
Fri, Apr 10th	@ NYM	Clay Holmes (5-6)	#62	@ CHC	Shota Imanaga (8-9)	#29
Sat, Apr 11th	@ NYM	Kodai Senga (0-9)	#102	@ CHC	Edward Cabrera (5-5)	#133
Sun, Apr 12th	@ NYM	Freddy Peralta (6-11)	#38	@ CHC	Jameson Taillon (2-6)	#179
Mon, Apr 13th	vs TEX	Nathan Eovaldi (10-9)	#80	vs WSH	Cade Cavalli (12-5)	#61
Tue, Apr 14th	vs TEX	MacKenzie Gore (7-10)	#35	vs WSH	PJ Poulin (3-0)
Wed, Apr 15th	vs TEX	Kumar Rocker (5-10)	#120	vs WSH	Jake Irvin (2-8)	#195
Thu, Apr 16th	vs TEX	Jack Leiter (3-7)	#229	vs WSH	Foster Griffin (15-4)	#37
Fri, Apr 17th	vs CWS	Davis Martin (9-6)	#121	vs TB	Nick Martinez (13-4)	#71
Sat, Apr 18th	vs CWS	Erick Fedde (7-8)	#239	vs TB	Drew Rasmussen (14-5)	#15
Sun, Apr 19th	vs CWS	Noah Schultz (3-9)	#382	vs TB	Shane McClanahan (10-6)	#52
Tue, Apr 21st	@ SEA	Luis Castillo (4-10)	#97	@ TEX	Kumar Rocker (5-10)	#120
Wed, Apr 22nd	@ SEA	Logan Gilbert (11-7)	#13	@ TEX	Jack Leiter (3-7)	#229
Thu, Apr 23rd				@ TEX	Jacob deGrom (9-9)	#7
Fri, Apr 24th	@ TEX	Nathan Eovaldi (10-9)	#80	@ MIL	Brandon Woodruff (2-2)
Sat, Apr 25th	@ TEX	MacKenzie Gore (7-10)	#35	@ MIL	Jacob Misiorowski (14-5)	#6
Sun, Apr 26th	@ TEX	Kumar Rocker (5-10)	#120	@ MIL	Kyle Harrison (10-3)	#54
Mon, Apr 27th				vs STL	Dustin May (6-8)	#44
Tue, Apr 28th	vs KC	Kris Bubic (3-2)	#131	vs STL	Kyle Leahy (10-4)	#96
Wed, Apr 29th	vs KC	Michael Wacha (8-8)	#69	vs STL	Andre Pallante (12-6)	#274
Thu, Apr 30th	vs KC	Noah Cameron (9-8)	#67	vs STL	Hunter Dobbins (3-3)	#188
Fri, May 1st	vs CLE	Joey Cantillo (9-7)	#79	vs CIN	Brady Singer (5-12)	#223
Sat, May 2nd	vs CLE	Slade Cecconi (4-7)	#130	vs CIN	Rhett Lowder (6-8)	#219
Sun, May 3rd	vs CLE	Parker Messick (10-8)	#32	vs CIN	Chase Burns (14-3)	#22
Tue, May 5th	@ PHI	Cristopher Sanchez (16-4)	#3	@ ARI	Eduardo Rodriguez (14-4)	#82
Wed, May 6th	@ PHI	Zack Wheeler (10-5)	#12	@ ARI	Michael Soroka (8-4)	#111
Thu, May 7th	@ PHI	Andrew Painter (3-8)	#198	@ ARI	Zac Gallen (3-9)	#177
Fri, May 8th	@ BAL	Kyle Bradish (7-12)	#53	@ SF	Robbie Ray (11-7)	#83
Sat, May 9th	@ BAL	Shane Baz (5-14)	#64	@ SF	Landen Roupp (8-13)	#74
Sun, May 10th	@ BAL	Keegan Akin (0-1)		@ SF	Tyler Mahle (5-10)	#68
Tue, May 12th	vs STL	Andre Pallante (12-6)	#274	vs COL	Michael Lorenzen (3-11)	#199
Wed, May 13th	vs STL	Matthew Liberatore (5-12)	#100	vs COL	Jose Quintana (2-3)	#432
Thu, May 14th	vs STL	Michael McGreevy (5-9)	#122	vs COL	Chase Dollander (3-3)
Fri, May 15th	vs SF	Tyler Mahle (5-10)	#68	vs PHI	Aaron Nola (5-10)	#47
Sat, May 16th	vs SF	Trevor McDonald (3-7)		vs PHI	Cristopher Sanchez (16-4)	#3
Sun, May 17th	vs SF	Adrian Houser (4-7)	#328	vs PHI	Zack Wheeler (10-5)	#12
Tue, May 19th	@ LAA	Reid Detmers (4-8)	#39	@ STL	Matthew Liberatore (5-12)	#100
Wed, May 20th	@ LAA	Jack Kochanowicz (2-5)		@ STL	Michael McGreevy (5-9)	#122
Thu, May 21st	@ LAA	Jose Soriano (11-7)	#36	@ STL	Dustin May (6-8)	#44
Fri, May 22nd	@ SD	Walker Buehler (8-6)	#212	@ TOR	Kevin Gausman (8-11)	#23
Sat, May 23rd	@ SD	Lucas Giolito (2-3)	#342	@ TOR	Patrick Corbin (3-4)
Sun, May 24th	@ SD	Michael King (8-9)	#55	@ TOR	Dylan Cease (9-5)	#10
Mon, May 25th	vs SEA	Luis Castillo (4-10)	#97	vs CHC	Ben Brown (4-2)	#202
Tue, May 26th	vs SEA	Emerson Hancock (7-8)	#65	vs CHC	Jordan Wicks (0-2)	#295
Wed, May 27th	vs SEA	Logan Gilbert (11-7)	#13	vs CHC	Jameson Taillon (2-6)	#179
Thu, May 28th				vs CHC	Colin Rea (8-8)	#169
Fri, May 29th	vs NYY	Carlos Rodon (4-3)	#42	vs MIN	Taj Bradley (9-6)	#40
Sat, May 30th	vs NYY	Ryan Weathers (5-8)	#233	vs MIN	Bailey Ober (7-4)	#108
Sun, May 31st	vs NYY	Will Warren (8-6)	#57	vs MIN	Zebby Matthews (8-8)	#105
Tue, Jun 2nd	@ CHC	Jameson Taillon (2-6)	#179	@ HOU	Mike Burrows (4-9)	#182
Wed, Jun 3rd	@ CHC	Colin Rea (8-8)	#169	@ HOU	Spencer Arrighetti (7-7)	#200
Thu, Jun 4th	@ CHC	Shota Imanaga (8-9)	#29	@ HOU	Kai-Wei Teng (5-6)	#183
Fri, Jun 5th	@ HOU	Peter Lambert (8-7)	#164	@ ATL	Martin Perez (8-8)	#226
Sat, Jun 6th	@ HOU	Tatsuya Imai (6-4)	#126	@ ATL	Spencer Strider (4-2)	#315
Sun, Jun 7th	@ HOU	Mike Burrows (4-9)	#182	@ ATL	Bryce Elder (8-7)	#187
Tue, Jun 9th	vs MIL	Robert Gasser (4-5)	#98	vs LAD	Eric Lauer (8-6)	#227
Wed, Jun 10th	vs MIL	Brandon Sproat (3-7)	#163	vs LAD	Shohei Ohtani (8-2)	#1
Thu, Jun 11th				vs LAD	Justin Wrobleski (11-5)	#134
Fri, Jun 12th	vs COL	Sean Sullivan (0-3)	#425	vs MIA	Sandy Alcantara (13-8)	#59
Sat, Jun 13th	vs COL	Kyle Freeland (4-10)	#419	vs MIA	Lake Bachar (1-3)	#248
Sun, Jun 14th	vs COL	Tomoyuki Sugano (12-8)	#436	vs MIA	Max Meyer (9-1)
Mon, Jun 15th	vs PIT	Jared Jones (2-6)	#63	@ ATH	J.T. Ginn (9-8)	#193
Tue, Jun 16th	vs PIT	Mitch Keller (6-8)		@ ATH	Jack Perkins (3-10)	#138
Wed, Jun 17th	vs PIT	Braxton Ashcraft (13-5)	#31	@ ATH	Aaron Civale (6-7)	#210
Fri, Jun 19th	vs LAA	Jose Soriano (11-7)	#36	@ COL	Kyle Freeland (4-10)	#419
Sat, Jun 20th	vs LAA	Walbert Urena (8-9)	#243	@ COL	Tomoyuki Sugano (12-8)	#436
Sun, Jun 21st	vs LAA	Reid Detmers (4-8)	#39	@ COL	Michael Lorenzen (3-11)	#199
Tue, Jun 23rd	@ SF	Robbie Ray (11-7)	#83	vs SEA	George Kirby (9-10)	#24
Wed, Jun 24th	@ SF	Tyler Mahle (5-10)	#68	vs SEA	Bryan Woo (9-9)	#11
Thu, Jun 25th	@ SF	Landen Roupp (8-13)	#74	vs SEA	Bryce Miller (4-8)	#73
Fri, Jun 26th	@ LAA	Walbert Urena (8-9)	#243	vs CIN	Andrew Abbott (6-10)	#90
Sat, Jun 27th	@ LAA	Reid Detmers (4-8)	#39	vs CIN	Chase Burns (14-3)	#22
Sun, Jun 28th	@ LAA	Sam Aldegheri (3-4)	#428	vs CIN	Brady Singer (5-12)	#223
Mon, Jun 29th	vs LAD	Eric Lauer (8-6)	#227	@ PHI	Aaron Nola (5-10)	#47
Tue, Jun 30th	vs LAD	Justin Wrobleski (11-5)	#134	@ PHI	Cristopher Sanchez (16-4)	#3
Wed, Jul 1st	vs LAD	Jack Dreyer (5-2)	#157	@ PHI	Zack Wheeler (10-5)	#12
Thu, Jul 2nd				@ PHI	Alan Rangel (0-3)	#400
Fri, Jul 3rd	vs MIA	Tyler Phillips (3-6)	#236	@ WSH	Foster Griffin (15-4)	#37
Sat, Jul 4th	vs MIA	Sandy Alcantara (13-8)	#59	@ WSH	Carson Palmquist (0-2)	#416
Sun, Jul 5th	vs MIA	Eury Perez (7-10)	#50	@ WSH	Cade Cavalli (12-5)	#61
Tue, Jul 7th	@ DET	Tarik Skubal (8-7)	#2	vs ATL	Hurston Waldrep (0-1)
Wed, Jul 8th	@ DET	Troy Melton (7-3)	#51	vs ATL	Grant Holmes (9-5)	#196
Thu, Jul 9th	@ DET	Framber Valdez (8-9)	#45	vs ATL	Bryce Elder (8-7)	#187
Sat, Jul 11th	@ CWS	Bryan Hudson (4-4)	#119	vs MIL	Shane Drohan (7-5)	#115
Sun, Jul 12th	@ CWS	Noah Schultz (3-9)	#382	vs MIL	Robert Gasser (4-5)	#98
Sat, Jul 18th	vs WSH	Zack Littell (8-8)	#276	@ CLE	Logan Allen (0-0)	#174
Sun, Jul 19th	vs WSH	Foster Griffin (15-4)	#37	@ CLE	Joey Cantillo (9-7)	#79
Mon, Jul 20th	@ ARI	Mitch Bratt (1-3)	#287	@ NYY	Ryan Weathers (5-8)	#233
Wed, Jul 22nd	@ ARI	Merrill Kelly (9-12)	#129	@ NYY	Max Fried (4-4)	#17
Fri, Jul 24th	@ MIN	Zebby Matthews (8-8)	#105	vs CHC	Matthew Boyd (8-3)	#43
Sat, Jul 25th	@ MIN	Kendry Rojas (1-1)	#244	vs CHC	Shota Imanaga (8-9)	#29
Sun, Jul 26th	@ MIN	Connor Prielipp (3-7)	#81	vs CHC	Jameson Taillon (2-6)	#179
Mon, Jul 27th	vs BOS	Payton Tolle (8-6)	#27	vs ARI	Merrill Kelly (9-12)	#129
Tue, Jul 28th	vs BOS	Jake Bennett (9-6)	#92	vs ARI	Brandon Pfaadt (7-1)	#76
Wed, Jul 29th	vs BOS	Patrick Sandoval (1-3)	#125	vs ARI	Eduardo Rodriguez (14-4)	#82
Thu, Jul 30th	vs BOS	Sonny Gray (16-4)	#25	@ CIN	Rhett Lowder (6-8)	#219
Fri, Jul 31st	vs DET	Tyler Holton (1-5)	#91	@ CIN	Hunter Greene (2-2)
Sat, Aug 1st	vs DET	Framber Valdez (8-9)	#45	@ CIN	Andrew Abbott (6-10)	#90
Sun, Aug 2nd	vs DET	Keider Montero (9-8)	#148	@ CIN	Chase Burns (14-3)	#22
Mon, Aug 3rd				@ MIL	Brandon Sproat (3-7)	#163
Tue, Aug 4th	@ CIN	Brady Singer (5-12)	#223	@ MIL	Logan Henderson (9-2)	#28
Wed, Aug 5th	@ CIN	Rhett Lowder (6-8)	#219	@ MIL	Kyle Harrison (10-3)	#54
Thu, Aug 6th	@ CIN	Andrew Abbott (6-10)	#90	@ MIL	Dustin May (6-8)	#44
Fri, Aug 7th	@ BOS	Payton Tolle (8-6)	#27	vs NYM	Zac Thornton (3-4)	#137
Sat, Aug 8th	@ BOS	Jake Bennett (9-6)	#92	vs NYM	Robert Stock (0-3)	#205
Sun, Aug 9th	@ BOS	Erik Miller		vs NYM	Sean Manaea (4-6)	#58
Tue, Aug 11th	vs TB	Nick Martinez (13-4)	#71	@ MIA	Eury Perez (7-10)	#50
Wed, Aug 12th	vs TB	Drew Rasmussen (14-5)	#15	@ MIA	Janson Junk (6-8)	#117
Thu, Aug 13th				@ MIA	Tyler Phillips (3-6)	#236
Fri, Aug 14th	vs TEX	Kumar Rocker (5-10)	#120	vs BOS	Jake Bennett (9-6)	#92
Sat, Aug 15th	vs TEX	MacKenzie Gore (7-10)	#35	vs BOS	Sonny Gray (16-4)	#25
Sun, Aug 16th	vs TEX	Cody Bradford (0-3)	#93	vs BOS	Patrick Sandoval (1-3)	#125
Mon, Aug 17th	@ KC	Michael Wacha (8-8)	#69	vs DET	Framber Valdez (8-9)	#45
Tue, Aug 18th	@ KC	Daniel Lynch (4-4)	#190	vs DET	Keider Montero (9-8)	#148
Wed, Aug 19th	@ KC	Seth Lugo (6-7)	#155	vs DET	Jackson Jobe (1-1)	#189
Fri, Aug 21st	@ HOU	Hayden Wesneski (4-1)	#94	@ LAD	Yoshinobu Yamamoto (12-8)	#8
Sat, Aug 22nd	@ HOU	Hunter Brown (4-3)	#26	@ LAD	Tarik Skubal (8-7)	#2
Sun, Aug 23rd	@ HOU	Cristian Javier (1-5)	#158	@ LAD	Blake Snell (2-1)	#16
Mon, Aug 24th	vs MIN	Zebby Matthews (8-8)	#105	@ SD	Robbie Ray (11-7)	#83
Tue, Aug 25th	vs MIN	Taj Bradley (9-6)	#40	@ SD	Michael King (8-9)	#55
Wed, Aug 26th	vs MIN	Connor Prielipp (3-7)	#81	@ SD	Randy Vasquez (10-6)	#252
Fri, Aug 28th	vs BAL	Brandon Young (9-3)	#167	@ STL	Quinn Mathews (1-2)	#170
Sat, Aug 29th	vs BAL	Shane Baz (5-14)	#64	@ STL	Kyle Leahy (10-4)	#96
Sun, Aug 30th	vs BAL	Chris Bassitt (5-4)	#110	@ STL	Matthew Liberatore (5-12)	#100
Tue, Sep 1st	@ TEX	MacKenzie Gore (7-10)	#35	vs SF	Logan Webb (8-8)	#21
Wed, Sep 2nd	@ TEX	Cody Bradford (0-3)	#93	vs SF	Landen Roupp (8-13)	#74
Thu, Sep 3rd	@ SEA	Kade Anderson (0-0)	#48	vs SF	Blade Tidwell (0-1)	#184
Fri, Sep 4th	@ SEA	Logan Gilbert (11-7)	#13	vs LAA	Reid Detmers (4-8)	#39
Sat, Sep 5th	@ SEA	George Kirby (9-10)	#24	vs LAA	Ryan Johnson (3-7)	#216
Sun, Sep 6th	@ SEA	Bryan Woo (9-9)	#11	vs LAA	Yusei Kikuchi (0-4)	#95
Tue, Sep 8th	vs TOR	Jose Soriano (11-7)	#36	@ CWS
Wed, Sep 9th	vs TOR			@ CWS
Thu, Sep 10th				@ CWS
Fri, Sep 11th	vs SEA			@ CHC
Sat, Sep 12th	vs SEA			@ CHC
Sun, Sep 13th	vs SEA			@ CHC
Tue, Sep 15th	@ TB			vs MIL
Wed, Sep 16th	@ TB			vs MIL
Thu, Sep 17th	@ TB			vs MIL
Fri, Sep 18th	@ CLE			vs KC
Sat, Sep 19th	@ CLE			vs KC
Sun, Sep 20th	@ CLE			vs KC
Tue, Sep 22nd	vs LAA			vs STL
Wed, Sep 23rd	vs LAA			vs STL
Thu, Sep 24th	vs HOU			vs STL
Fri, Sep 25th	vs HOU			@ DET
Sat, Sep 26th	vs HOU			@ DET
Sun, Sep 27th	vs HOU			@ DET
Fri, Mar 27th	@ TOR	Kevin Gausman (8-11)	#23
Thu, Apr 9th	@ NYY	Ryan Weathers (5-8)	#233
Mon, Apr 20th	@ SEA	Emerson Hancock (7-8)	#65
Mon, May 18th	@ LAA	Walbert Urena (8-9)	#243
Mon, Jun 8th	vs MIL	Kyle Harrison (10-3)	#54
Thu, Jun 18th	vs LAA	Ryan Johnson (3-7)	#216
Fri, Jul 10th	@ CWS	Sean Burke (7-6)	#78
Fri, Jul 17th	vs WSH	Cade Cavalli (12-5)	#61
Tue, Jul 21st	@ ARI	Kohl Drake (0-1)	#385
Mon, Aug 10th	vs TB	Freddy Peralta (6-11)	#38
Thu, Aug 20th	@ KC	Randy Dobnak (2-2)	#433
Mon, Aug 31st	@ TEX	Jacob deGrom (9-9)	#7
Mon, Sep 7th	vs TOR	Dylan Cease (9-5)	#10

Who Should I Trade?

Isaac Mattson for Mark Leiter Jr. (2026)

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