Isaac Mattson or Kyle Leahy

Baseball Stats Comparison

Stats
Projections
News & Notes
Schedule

Isaac Mattson or Kyle Leahy Player Statistics
	Kyle Leahy SP,RP - STL	Isaac Mattson RP - PIT
2026 Stats


Games Played	29	38

Games Started	29	0

Innings Pitched	138.0	38.2

Wins	10	0

Losses	5	0

Saves	0	0

Blown Saves	0	2

Holds	0	8

Hits Allowed	144	44

Earned Runs	56	23

Home Runs Allowed	15	3

Strikeouts	129	36

Walks	41	18

ERA	3.65	5.35

WHIP	1.34	1.60

Isaac Mattson or Kyle Leahy Player Projections
	Kyle Leahy SP,RP - STL	Isaac Mattson RP - PIT
2026 Projections


Games Played	46	57

Games Started	15	0

Innings Pitched	114.1	60.8

Wins	6	3

Losses	7	3

Saves	0	2

Blown Saves	1	1

Holds	4	14

Hits Allowed	113	55

Earned Runs	55	30

Home Runs Allowed	13	7

Strikeouts	95	59

Walks	40	28

ERA	4.34	4.44

WHIP	1.35	1.35

Isaac Mattson or Kyle Leahy Player Notes
	Kyle Leahy SP,RP - STL	Isaac Mattson RP - PIT
News
	Kyle Leahy allowed six earned runs on five hits and three walks while striking out one over three innings in Friday's loss to the Nationals. Chase Davis Sat, Sep 19th	The Pirates placed RHP Isaac Mattson on the 15-day injured list with hip inflammation. Ari Koslow Tue, Sep 8th
	Kyle Leahy struck out four while allowing two hits over three scoreless innings in Saturday's loss to the White Sox. Chase Davis Sun, Sep 13th	The Pirates recalled RHP Isaac Mattson from Triple-A Indianapolis. Ari Koslow Fri, Sep 4th
	Kyle Leahy allowed five earned runs on six hits and no walks while striking out six over 2.2 innings in Sunday's win over the Rockies. Chase Davis Mon, Sep 7th	The Pirates optioned Isaac Mattson to Triple-A Indianapolis. Ari Koslow Tue, Aug 18th
	Kyle Leahy allowed one earned run on four hits and one walk while striking out three over three innings in Saturday's loss to the Pirates. Chase Davis Sun, Aug 30th	The Pirates recalled RHP Isaac Mattson from Triple-A Indianapolis. Ari Koslow Thu, Aug 13th
	Kyle Leahy allowed zero earned runs on two hits and two walks while striking out four over four innings in Sunday's loss to the Phillies. Chase Davis Mon, Aug 24th	The Pirates optioned RHP Isaac Mattson to Triple-A Indianapolis. Ari Koslow Sun, Aug 2nd
Notes
There are no recent notes for these players

Isaac Mattson or Kyle Leahy Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	Kyle Leahy SP,RP - STL			Isaac Mattson RP - PIT
Thu, Mar 26th	vs TB	Drew Rasmussen (15-5)	#16	@ NYM	Freddy Peralta (9-11)	#40
Sat, Mar 28th	vs TB	Joe Boyle (0-1)	#140	@ NYM	David Peterson (9-8)	#93
Sun, Mar 29th	vs TB	Steven Matz (5-5)	#122	@ NYM	Nolan McLean (11-10)	#53
Mon, Mar 30th	vs NYM	Clay Holmes (6-8)	#85	@ CIN	Chase Burns (15-3)	#41
Tue, Mar 31st	vs NYM	Kodai Senga (0-9)	#60	@ CIN	Brandon Williamson (4-4)	#348
Wed, Apr 1st	vs NYM	Freddy Peralta (9-11)	#40	@ CIN	Andrew Abbott (6-11)	#144
Fri, Apr 3rd	@ DET	Framber Valdez (10-11)	#37	vs BAL	Kyle Bradish (7-14)
Sat, Apr 4th	@ DET	Jack Flaherty (3-8)	#88	vs BAL	Shane Baz (6-15)	#43
Sun, Apr 5th	@ DET	Keider Montero (10-9)	#138	vs BAL	Chris Bassitt (8-5)	#102
Mon, Apr 6th	@ WSH	Zack Littell (8-8)	#153	vs SD	German Marquez (4-2)
Tue, Apr 7th	@ WSH	Cade Cavalli (13-5)	#36	vs SD	Nick Pivetta (3-2)	#31
Wed, Apr 8th	@ WSH	Miles Mikolas (3-9)		vs SD	Michael King (12-9)	#62
Fri, Apr 10th	vs BOS	Connelly Early (7-5)	#81	@ CHC	Shota Imanaga (11-10)	#26
Sat, Apr 11th	vs BOS	Ranger Suarez (8-4)	#39	@ CHC	Edward Cabrera (5-5)	#168
Sun, Apr 12th	vs BOS	Brayan Bello (6-7)	#123	@ CHC	Jameson Taillon (2-6)
Mon, Apr 13th	vs CLE	Gavin Williams (14-8)	#15	vs WSH	Cade Cavalli (13-5)	#36
Tue, Apr 14th	vs CLE	Joey Cantillo (10-9)	#98	vs WSH	PJ Poulin (3-0)
Wed, Apr 15th	vs CLE	Slade Cecconi (5-7)	#238	vs WSH	Jake Irvin (2-9)	#119
Thu, Apr 16th				vs WSH	Foster Griffin (15-5)	#77
Fri, Apr 17th	@ HOU	Peter Lambert (8-10)	#136	vs TB	Nick Martinez (15-4)	#72
Sat, Apr 18th	@ HOU	Lance McCullers Jr. (2-3)		vs TB	Drew Rasmussen (15-5)	#16
Sun, Apr 19th	@ HOU	Mike Burrows (4-9)	#303	vs TB	Shane McClanahan (10-7)	#194
Tue, Apr 21st	@ MIA	Chris Paddack (0-7)		@ TEX	Kumar Rocker (5-11)	#116
Wed, Apr 22nd	@ MIA	Janson Junk (6-9)	#106	@ TEX	Jack Leiter (3-7)
Thu, Apr 23rd				@ TEX	Jacob deGrom (11-10)	#8
Fri, Apr 24th	vs SEA	George Kirby (9-11)	#22	@ MIL	Brandon Woodruff (2-2)
Sat, Apr 25th	vs SEA	Bryan Woo (12-9)	#17	@ MIL	Jacob Misiorowski (15-5)	#9
Sun, Apr 26th	vs SEA	Emerson Hancock (7-8)	#96	@ MIL	Kyle Harrison (10-5)	#52
Mon, Apr 27th	@ PIT	Mason Montgomery (6-3)	#124	vs STL	Dustin May (7-9)	#50
Tue, Apr 28th	@ PIT	Braxton Ashcraft (14-6)		vs STL	Kyle Leahy (10-5)	#107
Wed, Apr 29th	@ PIT	Bubba Chandler (8-9)	#99	vs STL	Andre Pallante (12-7)	#151
Thu, Apr 30th	@ PIT	Paul Skenes (10-11)	#10	vs STL	Hunter Dobbins (3-3)
Fri, May 1st	vs LAD	Emmet Sheehan (5-8)	#165	vs CIN	Brady Singer (6-15)	#335
Sat, May 2nd	vs LAD	Roki Sasaki (5-5)	#95	vs CIN	Rhett Lowder (6-12)	#218
Sun, May 3rd	vs LAD	Justin Wrobleski (11-5)	#47	vs CIN	Chase Burns (15-3)	#41
Tue, May 5th				@ ARI	Eduardo Rodriguez (15-7)	#86
Wed, May 6th	vs MIL	Brandon Sproat (3-7)	#278	@ ARI	Michael Soroka (8-5)	#64
Thu, May 7th	@ SD	Michael King (12-9)	#62	@ ARI	Zac Gallen (3-9)	#215
Fri, May 8th	@ SD	Griffin Canning (4-9)	#226	@ SF	Robbie Ray (13-8)	#160
Sat, May 9th	@ SD	Randy Vasquez (10-6)	#178	@ SF	Landen Roupp (9-14)	#84
Sun, May 10th	@ SD	Walker Buehler (9-6)	#272	@ SF	Tyler Mahle (7-10)	#54
Tue, May 12th	@ ATH	Jeffrey Springs (4-14)	#353	vs COL	Michael Lorenzen (3-13)
Wed, May 13th	@ ATH	J.T. Ginn (9-8)		vs COL	Jose Quintana (2-3)	#362
Thu, May 14th	@ ATH	Jacob Lopez (6-5)	#316	vs COL	Chase Dollander (3-3)
Fri, May 15th	vs KC	Michael Wacha (9-9)	#58	vs PHI	Aaron Nola (7-10)	#49
Sat, May 16th	vs KC	Noah Cameron (9-8)	#101	vs PHI	Cristopher Sanchez (18-6)	#5
Sun, May 17th	vs KC	Stephen Kolek (4-3)		vs PHI	Zack Wheeler (13-5)	#14
Tue, May 19th	vs PIT	Mitch Keller (6-8)		@ STL	Matthew Liberatore (5-14)	#117
Wed, May 20th	vs PIT	Carmen Mlodzinski (8-7)	#109	@ STL	Michael McGreevy (7-9)	#217
Thu, May 21st	vs PIT	Braxton Ashcraft (14-6)		@ STL	Dustin May (7-9)	#50
Fri, May 22nd				@ TOR	Kevin Gausman (9-12)	#21
Sat, May 23rd	@ CIN	Chase Petty (1-2)	#313	@ TOR	Patrick Corbin (3-4)
Sun, May 24th				@ TOR	Dylan Cease (11-6)	#24
Mon, May 25th	@ MIL	Jacob Misiorowski (15-5)	#9	vs CHC	Ben Brown (4-2)
Tue, May 26th	@ MIL	Kyle Harrison (10-5)	#52	vs CHC	Jordan Wicks (0-2)
Wed, May 27th	@ MIL	Chad Patrick (9-4)	#79	vs CHC	Jameson Taillon (2-6)
Thu, May 28th				vs CHC	Colin Rea (8-8)	#265
Fri, May 29th	vs CHC	Shota Imanaga (11-10)	#26	vs MIN	Taj Bradley (11-6)	#44
Sat, May 30th	vs CHC	Ben Brown (4-2)		vs MIN	Bailey Ober (7-6)	#90
Sun, May 31st	vs CHC	Jordan Wicks (0-2)		vs MIN	Zebby Matthews (9-11)	#59
Tue, Jun 2nd	vs TEX	Nathan Eovaldi (11-9)	#75	@ HOU	Mike Burrows (4-9)	#303
Wed, Jun 3rd	vs TEX	MacKenzie Gore (8-11)	#61	@ HOU	Spencer Arrighetti (9-9)	#276
Thu, Jun 4th				@ HOU	Kai-Wei Teng (5-7)	#277
Fri, Jun 5th	vs CIN	Brady Singer (6-15)	#335	@ ATL	Martin Perez (9-9)	#177
Sat, Jun 6th	vs CIN	Nick Lodolo (3-6)	#121	@ ATL	Spencer Strider (4-2)
Sun, Jun 7th	vs CIN	Rhett Lowder (6-12)	#218	@ ATL	Bryce Elder (8-8)
Tue, Jun 9th	@ NYM	Freddy Peralta (9-11)	#40	vs LAD	Eric Lauer (8-7)
Wed, Jun 10th	@ NYM	Austin Warren		vs LAD	Shohei Ohtani (8-2)	#13
Thu, Jun 11th	@ NYM	Christian Scott (4-5)	#57	vs LAD	Justin Wrobleski (11-5)	#47
Fri, Jun 12th	@ MIN	Joe Ryan (6-10)	#27	vs MIA	Sandy Alcantara (13-11)	#66
Sat, Jun 13th	@ MIN	Connor Prielipp (6-7)	#76	vs MIA	Lake Bachar (1-4)	#297
Sun, Jun 14th	@ MIN	Taj Bradley (11-6)	#44	vs MIA	Max Meyer (9-1)
Mon, Jun 15th	vs SD	Wandy Peralta (3-3)	#253	@ ATH	J.T. Ginn (9-8)
Tue, Jun 16th	vs SD	Michael King (12-9)	#62	@ ATH	Jack Perkins (3-12)	#114
Wed, Jun 17th	vs SD	Bradgley Rodriguez (3-3)	#224	@ ATH	Aaron Civale (6-7)	#166
Fri, Jun 19th	@ KC	Seth Lugo (7-9)	#132	@ COL	Kyle Freeland (4-10)	#274
Sat, Jun 20th				@ COL	Tomoyuki Sugano (12-11)	#359
Sun, Jun 21st	@ KC	Stephen Kolek (4-3)		@ COL	Michael Lorenzen (3-13)
Tue, Jun 23rd	vs ARI	Eduardo Rodriguez (15-7)	#86	vs SEA	George Kirby (9-11)	#22
Wed, Jun 24th	vs ARI	Mitch Bratt (1-3)		vs SEA	Bryan Woo (12-9)	#17
Thu, Jun 25th				vs SEA	Bryce Miller (4-9)	#48
Fri, Jun 26th	vs MIA	Max Meyer (9-1)		vs CIN	Andrew Abbott (6-11)	#144
Sat, Jun 27th	vs MIA	Ryan Gusto (1-5)	#135	vs CIN	Chase Burns (15-3)	#41
Sun, Jun 28th	vs MIA	Tyler Phillips (5-6)	#213	vs CIN	Brady Singer (6-15)	#335
Mon, Jun 29th				@ PHI	Aaron Nola (7-10)	#49
Tue, Jun 30th	@ ATL	Martin Perez (9-9)	#177	@ PHI	Cristopher Sanchez (18-6)	#5
Wed, Jul 1st	@ ATL	Reynaldo Lopez (4-5)		@ PHI	Zack Wheeler (13-5)	#14
Thu, Jul 2nd	@ ATL	Hurston Waldrep (0-1)		@ PHI	Alan Rangel (0-3)	#331
Fri, Jul 3rd	@ CHC	David Peterson (9-8)	#93	@ WSH	Foster Griffin (15-5)	#77
Sat, Jul 4th	@ CHC	Shota Imanaga (11-10)	#26	@ WSH	Carson Palmquist (0-2)
Sun, Jul 5th	@ CHC	Javier Assad (6-1)	#163	@ WSH	Cade Cavalli (13-5)	#36
Tue, Jul 7th	vs MIL	Robert Gasser (5-5)	#112	vs ATL	Hurston Waldrep (0-1)
Wed, Jul 8th	vs MIL	Kyle Harrison (10-5)	#52	vs ATL	Grant Holmes (10-5)	#158
Thu, Jul 9th	vs MIL	Logan Henderson (10-3)	#35	vs ATL	Bryce Elder (8-8)
Sat, Jul 11th	vs ATL	Reynaldo Lopez (4-5)		vs MIL	Shane Drohan (7-5)	#94
Sun, Jul 12th	vs ATL	Danny Young		vs MIL	Robert Gasser (5-5)	#112
Sat, Jul 18th	@ ARI	Brandon Pfaadt (7-3)	#83	@ CLE	Logan Allen (0-0)	#204
Sun, Jul 19th	@ ARI	Eduardo Rodriguez (15-7)	#86	@ CLE	Joey Cantillo (10-9)	#98
Mon, Jul 20th	@ LAA	Jose Soriano (12-8)	#23	@ NYY	Ryan Weathers (5-8)
Wed, Jul 22nd	@ LAA	Reid Detmers (6-8)	#30	@ NYY	Max Fried (5-4)	#6
Fri, Jul 24th	vs CIN	Rhett Lowder (6-12)	#218	vs CHC	Matthew Boyd (9-5)	#46
Sat, Jul 25th	vs CIN	Hunter Greene (2-2)		vs CHC	Shota Imanaga (11-10)	#26
Sun, Jul 26th	vs CIN	Andrew Abbott (6-11)	#144	vs CHC	Jameson Taillon (2-6)
Mon, Jul 27th	vs CHC	David Peterson (9-8)	#93	vs ARI	Merrill Kelly (9-14)	#141
Tue, Jul 28th	vs CHC	Colin Rea (8-8)	#265	vs ARI	Brandon Pfaadt (7-3)	#83
Wed, Jul 29th	vs CHC	Matthew Boyd (9-5)	#46	vs ARI	Eduardo Rodriguez (15-7)	#86
Thu, Jul 30th	vs CHC	Javier Assad (6-1)	#163	@ CIN	Rhett Lowder (6-12)	#218
Fri, Jul 31st	@ TOR	Dylan Cease (11-6)	#24	@ CIN	Hunter Greene (2-2)
Sat, Aug 1st	@ TOR	Kevin Gausman (9-12)	#21	@ CIN	Andrew Abbott (6-11)	#144
Sun, Aug 2nd	@ TOR	Max Scherzer (3-8)	#108	@ CIN	Chase Burns (15-3)	#41
Mon, Aug 3rd	@ NYY	Cam Schlittler (14-6)	#4	@ MIL	Brandon Sproat (3-7)	#278
Tue, Aug 4th	@ NYY	Ryan Weathers (5-8)		@ MIL	Logan Henderson (10-3)	#35
Wed, Aug 5th	@ NYY	Will Warren (10-6)	#55	@ MIL	Kyle Harrison (10-5)	#52
Thu, Aug 6th				@ MIL	Dustin May (7-9)	#50
Fri, Aug 7th	vs COL	Ryan Feltner (6-10)	#361	vs NYM	Zac Thornton (5-5)	#248
Sat, Aug 8th	vs COL	Kyle Freeland (4-10)	#274	vs NYM	Robert Stock (1-3)
Sun, Aug 9th	vs COL	Michael Lorenzen (3-13)		vs NYM	Sean Manaea (5-7)	#80
Tue, Aug 11th	vs PHI	Cristopher Sanchez (18-6)	#5	@ MIA	Eury Perez (7-11)	#65
Wed, Aug 12th	vs PHI	Zack Wheeler (13-5)	#14	@ MIA	Janson Junk (6-9)	#106
Thu, Aug 13th				@ MIA	Tyler Phillips (5-6)	#213
Fri, Aug 14th	@ CHC	Clay Holmes (6-8)	#85	vs BOS	Jake Bennett (9-7)	#67
Sat, Aug 15th	@ CHC	Matthew Boyd (9-5)	#46	vs BOS	Sonny Gray (17-5)	#42
Sun, Aug 16th	@ CHC	Edward Cabrera (5-5)	#168	vs BOS	Patrick Sandoval (1-7)	#150
Mon, Aug 17th	@ CIN	Rhett Lowder (6-12)	#218	vs DET	Framber Valdez (10-11)	#37
Tue, Aug 18th	@ CIN	Andrew Abbott (6-11)	#144	vs DET	Keider Montero (10-9)	#138
Wed, Aug 19th	@ CIN	Chase Burns (15-3)	#41	vs DET	Jackson Jobe (2-3)	#241
Fri, Aug 21st	@ PHI	Jesus Luzardo (14-5)		@ LAD	Yoshinobu Yamamoto (14-8)	#3
Sat, Aug 22nd	@ PHI	Andrew Painter (3-10)	#131	@ LAD	Tarik Skubal (11-7)	#1
Sun, Aug 23rd	@ PHI	Cristopher Sanchez (18-6)	#5	@ LAD	Blake Snell (4-1)	#28
Mon, Aug 24th				@ SD	Robbie Ray (13-8)	#160
Tue, Aug 25th	vs BAL	Chris Bassitt (8-5)	#102	@ SD	Michael King (12-9)	#62
Wed, Aug 26th	vs BAL	Kyle Bradish (7-14)		@ SD	Randy Vasquez (10-6)	#178
Fri, Aug 28th	vs PIT	Jared Jones (4-6)	#25	@ STL	Quinn Mathews (2-3)	#214
Sat, Aug 29th	vs PIT	Lake Bachar (1-4)	#297	@ STL	Kyle Leahy (10-5)	#107
Sun, Aug 30th	vs PIT	Braxton Ashcraft (14-6)		@ STL	Matthew Liberatore (5-14)	#117
Tue, Sep 1st	@ LAD	Eric Lauer (8-7)		vs SF	Logan Webb (8-9)
Wed, Sep 2nd	@ LAD	Yoshinobu Yamamoto (14-8)	#3	vs SF	Landen Roupp (9-14)	#84
Thu, Sep 3rd	@ LAD	Tarik Skubal (11-7)	#1	vs SF	Blade Tidwell (1-2)	#190
Fri, Sep 4th	@ COL	Ryan Feltner (6-10)	#361	vs LAA	Ryan Johnson (5-9)	#183
Sat, Sep 5th	@ COL	Mason Adams (0-1)	#352	vs LAA	Yusei Kikuchi (1-6)	#92
Sun, Sep 6th	@ COL	Tanner Gordon (1-5)	#254	vs LAA	Walbert Urena (9-10)	#263
Tue, Sep 8th	@ SF	Landen Roupp (9-14)	#84	@ CWS	Sean Burke (10-7)	#73
Wed, Sep 9th	@ SF	Blade Tidwell (1-2)	#190	@ CWS	Davis Martin (9-7)	#111
Thu, Sep 10th				@ CWS	Hagen Smith (3-2)	#78
Fri, Sep 11th	vs CWS	Anthony Kay (9-9)	#290	@ CHC	Shota Imanaga (11-10)	#26
Sat, Sep 12th	vs CWS	Sean Newcomb (2-5)	#216	@ CHC	Clay Holmes (6-8)	#85
Sun, Sep 13th	vs CWS	David Sandlin (2-2)	#270	@ CHC	Matthew Boyd (9-5)	#46
Tue, Sep 15th	vs SF	Blade Tidwell (1-2)	#190	vs MIL	Jacob Misiorowski (15-5)	#9
Wed, Sep 16th	vs SF	Anthony Molina (3-1)	#230	vs MIL	Logan Henderson (10-3)	#35
Thu, Sep 17th				vs MIL	Kyle Harrison (10-5)	#52
Fri, Sep 18th	vs WSH	Cade Cavalli (13-5)	#36	vs KC	Randy Dobnak (3-4)	#329
Sat, Sep 19th	vs WSH	Andrew Alvarez (2-6)	#149	vs KC	Noah Cameron (9-8)	#101
Sun, Sep 20th	vs WSH	Jake Irvin (2-9)	#119	vs KC	Michael Wacha (9-9)	#58
Tue, Sep 22nd	@ PIT	Jared Jones (4-6)	#25	vs STL	Andre Pallante (12-7)	#151
Wed, Sep 23rd	@ PIT	Lake Bachar (1-4)	#297	vs STL	Matthew Liberatore (5-14)	#117
Thu, Sep 24th	@ PIT	Paul Skenes (10-11)	#10	vs STL	Kyle Leahy (10-5)	#107
Fri, Sep 25th	@ MIL	Robert Gasser (5-5)	#112	@ DET	Jackson Jobe (2-3)	#241
Sat, Sep 26th	@ MIL	Dustin May (7-9)	#50	@ DET	Justin Verlander (0-1)	#255
Sun, Sep 27th	@ MIL	Colton Gordon (0-0)	#231	@ DET	River Ryan (0-0)	#128
Mon, Apr 20th	@ MIA	Max Meyer (9-1)
Mon, May 4th	vs MIL	Chad Patrick (9-4)	#79
Mon, Jun 1st	vs TEX	Jacob deGrom (11-10)	#8
Thu, Jun 18th	@ KC	Noah Cameron (9-8)	#101
Mon, Jun 22nd	vs ARI	Merrill Kelly (9-14)	#141
Mon, Jul 6th	vs MIL	Shane Drohan (7-5)	#94
Fri, Jul 10th	vs ATL	Chris Sale (14-9)	#2
Fri, Jul 17th	@ ARI	Merrill Kelly (9-14)	#141
Tue, Jul 21st	@ LAA	Walbert Urena (9-10)	#263
Thu, Jul 23rd	vs ARI	Brandon Pfaadt (7-3)	#83
Mon, Aug 10th	vs PHI	Andrew Painter (3-10)	#131
Thu, Aug 20th	@ CIN	Brady Singer (6-15)	#335
Thu, Aug 27th	vs BAL	Trevor Rogers (10-11)	#29
Mon, Sep 7th	@ SF	Logan Webb (8-9)
Mon, Sep 14th	vs SF	Landen Roupp (9-14)	#84