Riley O'Brien or Zack Kelly

Baseball Stats Comparison

Stats
Projections
News & Notes
Schedule

Riley O'Brien or Zack Kelly Player Statistics
	Riley O'Brien RP - STL	Zack Kelly SP,RP - BOS
2026 Stats


Games Played	65	17

Games Started	0	0

Innings Pitched	63.0	16.1

Wins	3	0

Losses	9	2

Saves	37	0

Blown Saves	8	1

Holds	1	3

Hits Allowed	53	14

Earned Runs	29	6

Home Runs Allowed	5	1

Strikeouts	64	14

Walks	29	7

ERA	4.14	3.31

WHIP	1.30	1.29

Riley O'Brien or Zack Kelly Player Projections
	Riley O'Brien RP - STL	Zack Kelly SP,RP - BOS
2026 Projections


Games Played	59	51

Games Started	0	0

Innings Pitched	60.2	54.0

Wins	3	3

Losses	3	3

Saves	14	0

Blown Saves	1	0

Holds	11	9

Hits Allowed	52	50

Earned Runs	26	28

Home Runs Allowed	5	7

Strikeouts	63	53

Walks	27	25

ERA	3.92	4.59

WHIP	1.31	1.38

Riley O'Brien or Zack Kelly Player Notes
	Riley O'Brien RP - STL	Zack Kelly SP,RP - BOS
News
	Riley O'Brien struck out two batters while allowing one hit and one walk in a scoreless appearance to earn the save in Monday's 2-1 win over the Giants. Chase Davis Tue, Sep 15th	Zack Kelly progressed to throwing live batting practice. Ari Koslow Sun, Sep 13th
	Riley O'Brien allowed two earned runs on one hit and one walk while striking out two across one inning in Saturday's 6-5 loss to the White Sox. Chase Davis Sun, Sep 13th	The Red Sox placed Zack Kelly on the 60-day injured list. Ari Koslow Tue, Jul 21st
	Riley O'Brien struck out two batters while allowing one hit in a scoreless outing to earn the save in Friday's 7-6 win over the Rockies. Chase Davis Sat, Sep 5th	The Red Sox officially optioned Zack Kelly to Triple-A. Ari Koslow Fri, May 22nd
	Riley O'Brien struck out one batter while allowing the ghost runner to score to earn the save in Wednesday's 8-6 win over the Dodgers. Chase Davis Thu, Sep 3rd	The Red Sox optioned Zack Kelly to Triple-A Worcester. Ari Koslow Thu, May 21st
	Riley O'Brien struck out one batter while allowing one hit in a scoreless appearance to earn the save in Thursday's 7-5 win over the Orioles. Chase Davis Fri, Aug 28th	Zack Kelly has been called up from Triple-A. Vince DiSilvio Fri, Apr 3rd
Notes
There are no recent notes for these players

Riley O'Brien or Zack Kelly Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	Riley O'Brien RP - STL			Zack Kelly SP,RP - BOS
Thu, Mar 26th	vs TB	Drew Rasmussen (15-5)	#14	@ CIN	Andrew Abbott (6-11)	#195
Sat, Mar 28th	vs TB	Joe Boyle (0-1)	#261	@ CIN	Brady Singer (6-15)	#350
Sun, Mar 29th	vs TB	Steven Matz (5-5)	#256	@ CIN	Rhett Lowder (6-11)	#331
Mon, Mar 30th	vs NYM	Clay Holmes (6-8)	#47	@ HOU	Lance McCullers Jr. (2-3)
Tue, Mar 31st	vs NYM	Kodai Senga (0-9)	#64	@ HOU	Hunter Brown (6-3)	#17
Wed, Apr 1st	vs NYM	Freddy Peralta (9-11)	#29	@ HOU	Mike Burrows (4-9)	#287
Fri, Apr 3rd	@ DET	Framber Valdez (10-11)	#40	vs SD	Michael King (12-9)	#45
Sat, Apr 4th	@ DET	Jack Flaherty (3-8)	#94	vs SD	Randy Vasquez (10-6)	#336
Sun, Apr 5th	@ DET	Keider Montero (9-9)	#184	vs SD	Walker Buehler (8-6)	#338
Mon, Apr 6th	@ WSH	Zack Littell (8-8)	#321	vs MIL	Brandon Woodruff (2-2)
Tue, Apr 7th	@ WSH	Cade Cavalli (13-5)	#53	vs MIL	Jacob Misiorowski (15-5)	#7
Wed, Apr 8th	@ WSH	Miles Mikolas (3-9)		vs MIL	Shane Drohan (7-5)	#100
Fri, Apr 10th	vs BOS	Connelly Early (7-5)	#103	@ STL	Dustin May (7-9)	#52
Sat, Apr 11th	vs BOS	Ranger Suarez (8-4)	#26	@ STL	Kyle Leahy (10-5)	#76
Sun, Apr 12th	vs BOS	Brayan Bello (6-7)	#146	@ STL	Andre Pallante (12-7)	#213
Mon, Apr 13th	vs CLE	Gavin Williams (13-8)	#15	@ MIN	Bailey Ober (7-6)	#99
Tue, Apr 14th	vs CLE	Joey Cantillo (10-9)	#72	@ MIN	Mick Abel (1-2)
Wed, Apr 15th	vs CLE	Slade Cecconi (5-7)	#223	@ MIN	Simeon Woods Richardson (2-7)
Fri, Apr 17th	@ HOU	Peter Lambert (8-10)	#222	vs DET	Casey Mize (6-9)	#61
Sat, Apr 18th	@ HOU	Lance McCullers Jr. (2-3)		vs DET	Tarik Skubal (11-7)	#1
Sun, Apr 19th	@ HOU	Mike Burrows (4-9)	#287	vs DET	Framber Valdez (10-11)	#40
Mon, Apr 20th	@ MIA	Max Meyer (9-1)		vs DET	Jack Flaherty (3-8)	#94
Tue, Apr 21st	@ MIA	Chris Paddack (0-7)		vs NYY	Luis Gil (1-2)	#122
Wed, Apr 22nd	@ MIA	Janson Junk (6-9)	#124	vs NYY	Max Fried (5-4)	#16
Fri, Apr 24th	vs SEA	George Kirby (9-11)	#22	@ BAL	Brandon Young (9-4)	#178
Sat, Apr 25th	vs SEA	Bryan Woo (12-9)	#10	@ BAL	Trevor Rogers (10-11)	#41
Sun, Apr 26th	vs SEA	Emerson Hancock (7-8)	#127	@ BAL	Kyle Bradish (7-14)
Mon, Apr 27th	@ PIT	Mason Montgomery (6-3)	#78	@ TOR	Dylan Cease (11-6)	#8
Tue, Apr 28th	@ PIT	Braxton Ashcraft (14-6)		@ TOR	Trey Yesavage (5-5)	#89
Wed, Apr 29th	@ PIT	Bubba Chandler (8-9)	#84	@ TOR	Eric Lauer (8-7)
Thu, Apr 30th	@ PIT	Paul Skenes (10-11)	#2
Fri, May 1st	vs LAD	Emmet Sheehan (5-8)	#141	vs HOU	Mike Burrows (4-9)	#287
Sat, May 2nd	vs LAD	Roki Sasaki (5-5)	#105	vs HOU	Spencer Arrighetti (8-9)	#279
Sun, May 3rd	vs LAD	Justin Wrobleski (11-5)	#74	vs HOU	Cody Bolton (0-1)	#351
Mon, May 4th	vs MIL	Chad Patrick (9-4)	#259	@ DET	Tyler Holton (2-5)	#120
Wed, May 6th	vs MIL	Brandon Sproat (3-7)	#268	@ DET	Jack Flaherty (3-8)	#94
Thu, May 7th	@ SD	Michael King (12-9)	#45	vs TB	Griffin Jax (7-10)	#19
Fri, May 8th	@ SD	Griffin Canning (4-9)	#144	vs TB	Jesse Scholtens (5-3)	#218
Sat, May 9th	@ SD	Randy Vasquez (10-6)	#336
Sun, May 10th	@ SD	Walker Buehler (8-6)	#338	vs TB	Nick Martinez (15-4)	#55
Tue, May 12th	@ ATH	Jeffrey Springs (4-14)	#363	vs PHI	Zack Wheeler (13-5)	#12
Wed, May 13th	@ ATH	J.T. Ginn (9-8)		vs PHI	Andrew Painter (3-10)	#233
Thu, May 14th	@ ATH	Jacob Lopez (6-5)	#335	vs PHI	Jesus Luzardo (14-5)
Fri, May 15th	vs KC	Michael Wacha (9-9)	#73	@ ATL	Spencer Strider (4-2)
Sat, May 16th	vs KC	Noah Cameron (9-8)	#92	@ ATL	Bryce Elder (8-8)
Sun, May 17th	vs KC	Stephen Kolek (4-3)		@ ATL	Grant Holmes (10-5)	#198
Tue, May 19th	vs PIT	Mitch Keller (6-8)		@ KC	Bailey Falter (0-2)
Wed, May 20th	vs PIT	Carmen Mlodzinski (7-7)	#150	@ KC	Michael Wacha (9-9)	#73
Thu, May 21st	vs PIT	Braxton Ashcraft (14-6)
Sat, May 23rd	@ CIN	Chase Petty (1-2)	#340	vs MIN	Taj Bradley (11-6)	#44
Mon, May 25th	@ MIL	Jacob Misiorowski (15-5)	#7
Tue, May 26th	@ MIL	Kyle Harrison (10-5)	#65	vs ATL	Spencer Strider (4-2)
Wed, May 27th	@ MIL	Chad Patrick (9-4)	#259	vs ATL	Bryce Elder (8-8)
Fri, May 29th	vs CHC	Shota Imanaga (11-10)	#20	@ CLE	Slade Cecconi (5-7)	#223
Sat, May 30th	vs CHC	Ben Brown (4-2)		@ CLE	Parker Messick (12-9)	#37
Sun, May 31st	vs CHC	Jordan Wicks (0-2)		@ CLE	Tanner Bibee (6-15)	#75
Mon, Jun 1st	vs TEX	Jacob deGrom (11-9)	#4
Tue, Jun 2nd	vs TEX	Nathan Eovaldi (11-9)	#68	vs BAL	Shane Baz (6-15)	#51
Wed, Jun 3rd	vs TEX	MacKenzie Gore (8-11)	#38	vs BAL	Chris Bassitt (8-5)	#216
Fri, Jun 5th	vs CIN	Brady Singer (6-15)	#350	@ NYY	Ryan Weathers (5-8)	#183
Sat, Jun 6th	vs CIN	Nick Lodolo (3-6)	#189
Sun, Jun 7th	vs CIN	Rhett Lowder (6-11)	#331	@ NYY	Cam Schlittler (14-6)	#9
Tue, Jun 9th	@ NYM	Freddy Peralta (9-11)	#29	@ TB	Nick Martinez (15-4)	#55
Wed, Jun 10th	@ NYM	Austin Warren		@ TB	Drew Rasmussen (15-5)	#14
Thu, Jun 11th	@ NYM	Christian Scott (4-5)	#59
Fri, Jun 12th	@ MIN	Joe Ryan (6-10)	#46	vs TEX	Jack Leiter (3-7)
Sat, Jun 13th	@ MIN	Connor Prielipp (6-7)	#66	vs TEX	Jacob deGrom (11-9)	#4
Sun, Jun 14th	@ MIN	Taj Bradley (11-6)	#44	vs TEX	Nathan Eovaldi (11-9)	#68
Mon, Jun 15th	vs SD	Wandy Peralta (3-3)	#143
Tue, Jun 16th	vs SD	Michael King (12-9)	#45	vs TOR	Dylan Cease (11-6)	#8
Wed, Jun 17th	vs SD	Bradgley Rodriguez (3-3)	#138	vs TOR	Braydon Fisher (3-4)	#130
Thu, Jun 18th	@ KC	Noah Cameron (9-8)	#92	vs TOR	Trey Yesavage (5-5)	#89
Fri, Jun 19th	@ KC	Seth Lugo (7-9)	#180	@ SEA	Bryce Miller (4-9)	#60
Sun, Jun 21st	@ KC	Stephen Kolek (4-3)		@ SEA	Logan Gilbert (12-10)	#11
Mon, Jun 22nd	vs ARI	Merrill Kelly (9-14)	#71	@ COL	Ryan Feltner (6-10)	#354
Tue, Jun 23rd	vs ARI	Eduardo Rodriguez (15-7)	#115	@ COL	Sean Sullivan (0-3)	#352
Wed, Jun 24th	vs ARI	Mitch Bratt (1-3)		@ COL	Kyle Freeland (4-10)	#357
Fri, Jun 26th	vs MIA	Max Meyer (9-1)		vs NYY	Will Warren (10-6)	#30
Sat, Jun 27th	vs MIA	Ryan Gusto (1-5)	#202	vs NYY	Gerrit Cole (9-9)	#18
Sun, Jun 28th	vs MIA	Tyler Phillips (5-6)	#332	vs NYY	Carlos Rodon (6-3)	#27
Tue, Jun 30th	@ ATL	Martin Perez (9-9)	#247	vs WSH	Cade Cavalli (13-5)	#53
Wed, Jul 1st	@ ATL	Reynaldo Lopez (4-5)		vs WSH	Brad Lord (5-2)	#196
Thu, Jul 2nd	@ ATL	Hurston Waldrep (0-1)
Fri, Jul 3rd	@ CHC	David Peterson (8-8)	#101	@ LAA	Reid Detmers (6-8)	#33
Sat, Jul 4th	@ CHC	Shota Imanaga (11-10)	#20	@ LAA	Sam Aldegheri (3-4)	#346
Sun, Jul 5th	@ CHC	Javier Assad (6-1)	#182	@ LAA	Ryan Johnson (5-8)	#301
Mon, Jul 6th	vs MIL	Shane Drohan (7-5)	#100
Tue, Jul 7th	vs MIL	Robert Gasser (5-5)	#109	@ CWS	Noah Schultz (3-9)	#246
Wed, Jul 8th	vs MIL	Kyle Harrison (10-5)	#65	@ CWS	Davis Martin (9-7)	#148
Thu, Jul 9th	vs MIL	Logan Henderson (10-3)	#23	@ CWS	Anthony Kay (9-9)	#275
Fri, Jul 10th	vs ATL	Chris Sale (14-9)	#6	@ NYM	Nolan McLean (11-10)	#24
Sat, Jul 11th	vs ATL	Reynaldo Lopez (4-5)		@ NYM	Freddy Peralta (9-11)	#29
Sun, Jul 12th	vs ATL	Danny Young		@ NYM	Zac Thornton (5-5)	#154
Fri, Jul 17th	@ ARI	Merrill Kelly (9-14)	#71	vs TB	Mason Englert (0-3)	#226
Sat, Jul 18th	@ ARI	Brandon Pfaadt (7-3)	#107	vs TB	Ian Seymour (9-7)	#25
Sun, Jul 19th	@ ARI	Eduardo Rodriguez (15-7)	#115	vs TB	Shane McClanahan (10-7)	#224
Mon, Jul 20th	@ LAA	Jose Soriano (12-8)	#34	vs BAL	Shane Baz (6-15)	#51
Tue, Jul 21st	@ LAA	Walbert Urena (9-10)	#187
Wed, Jul 22nd	@ LAA	Reid Detmers (6-8)	#33	vs BAL	Kyle Bradish (7-14)
Thu, Jul 23rd	vs ARI	Brandon Pfaadt (7-3)	#107
Fri, Jul 24th	vs CIN	Rhett Lowder (6-11)	#331	vs TOR	Trey Yesavage (5-5)	#89
Sat, Jul 25th	vs CIN	Hunter Greene (2-2)		vs TOR	Dylan Cease (11-6)	#8
Sun, Jul 26th	vs CIN	Andrew Abbott (6-11)	#195	vs TOR	Kevin Gausman (9-12)	#21
Mon, Jul 27th	vs CHC	David Peterson (8-8)	#101	@ ATH	Jack Perkins (3-11)	#211
Tue, Jul 28th	vs CHC	Colin Rea (8-8)	#152	@ ATH	Gage Jump (6-11)
Wed, Jul 29th	vs CHC	Matthew Boyd (9-5)	#36	@ ATH	Jacob Lopez (6-5)	#335
Thu, Jul 30th	vs CHC	Javier Assad (6-1)	#182	@ ATH	Mason Barnett (1-4)	#370
Fri, Jul 31st	@ TOR	Dylan Cease (11-6)	#8	@ LAD	Edgardo Henriquez
Sat, Aug 1st	@ TOR	Kevin Gausman (9-12)	#21	@ LAD	Yoshinobu Yamamoto (14-8)	#5
Sun, Aug 2nd	@ TOR	Max Scherzer (3-8)	#108	@ LAD	Emmet Sheehan (5-8)	#141
Mon, Aug 3rd	@ NYY	Cam Schlittler (14-6)	#9
Tue, Aug 4th	@ NYY	Ryan Weathers (5-8)	#183	vs CWS	Davis Martin (9-7)	#148
Wed, Aug 5th	@ NYY	Will Warren (10-6)	#30	vs CWS	Sean Burke (10-7)	#69
Fri, Aug 7th	vs COL	Ryan Feltner (6-10)	#354	vs ATH	Jack Perkins (3-11)	#211
Sat, Aug 8th	vs COL	Kyle Freeland (4-10)	#357	vs ATH	Gage Jump (6-11)
Sun, Aug 9th	vs COL	Michael Lorenzen (3-13)	#230	vs ATH	J.T. Ginn (9-8)
Mon, Aug 10th	vs PHI	Andrew Painter (3-10)	#233	@ TOR	Jameson Taillon (2-6)
Tue, Aug 11th	vs PHI	Cristopher Sanchez (17-6)	#3	@ TOR	Dylan Cease (11-6)	#8
Wed, Aug 12th	vs PHI	Zack Wheeler (13-5)	#12	@ TOR	Jose Soriano (12-8)	#34
Fri, Aug 14th	@ CHC	Clay Holmes (6-8)	#47	@ PIT	Bubba Chandler (8-9)	#84
Sat, Aug 15th	@ CHC	Matthew Boyd (9-5)	#36	@ PIT	Jared Jones (4-6)	#42
Sun, Aug 16th	@ CHC	Edward Cabrera (5-5)	#113	@ PIT	Lake Bachar (1-4)	#145
Mon, Aug 17th	@ CIN	Rhett Lowder (6-11)	#331	vs ARI	Mitch Bratt (1-3)
Tue, Aug 18th	@ CIN	Andrew Abbott (6-11)	#195	vs ARI	Merrill Kelly (9-14)	#71
Wed, Aug 19th	@ CIN	Chase Burns (15-3)	#49	vs ARI	Brandon Pfaadt (7-3)	#107
Thu, Aug 20th	@ CIN	Brady Singer (6-15)	#350
Fri, Aug 21st	@ PHI	Jesus Luzardo (14-5)		vs SF	Logan Webb (8-9)	#54
Sat, Aug 22nd	@ PHI	Andrew Painter (3-10)	#233	vs SF	Blade Tidwell (1-2)	#312
Sun, Aug 23rd	@ PHI	Cristopher Sanchez (17-6)	#3	vs SF	Matt Wilkinson (1-3)	#227
Tue, Aug 25th	vs BAL	Chris Bassitt (8-5)	#216	@ MIA	Tyler Phillips (5-6)	#332
Wed, Aug 26th	vs BAL	Kyle Bradish (7-14)		@ MIA	Ryan Gusto (1-5)	#202
Thu, Aug 27th	vs BAL	Trevor Rogers (10-11)	#41
Fri, Aug 28th	vs PIT	Jared Jones (4-6)	#42	@ NYY	Cam Schlittler (14-6)	#9
Sat, Aug 29th	vs PIT	Lake Bachar (1-4)	#145	@ NYY	Max Fried (5-4)	#16
Sun, Aug 30th	vs PIT	Braxton Ashcraft (14-6)		@ NYY	Will Warren (10-6)	#30
Tue, Sep 1st	@ LAD	Eric Lauer (8-7)		vs SEA	Bryan Woo (12-9)	#10
Wed, Sep 2nd	@ LAD	Yoshinobu Yamamoto (14-8)	#5	vs SEA	Bryce Miller (4-9)	#60
Thu, Sep 3rd	@ LAD	Tarik Skubal (11-7)	#1	@ BAL	Brandon Young (9-4)	#178
Fri, Sep 4th	@ COL	Ryan Feltner (6-10)	#354	@ BAL	Shane Baz (6-15)	#51
Sat, Sep 5th	@ COL	Mason Adams (0-1)	#361	@ BAL	Chris Bassitt (8-5)	#216
Sun, Sep 6th	@ COL	Tanner Gordon (1-5)	#364	@ BAL	Kyle Bradish (7-14)
Mon, Sep 7th	@ SF	Logan Webb (8-9)	#54	vs LAA	Grayson Rodriguez (4-8)	#82
Tue, Sep 8th	@ SF	Landen Roupp (9-14)	#85	vs LAA	Reid Detmers (6-8)	#33
Wed, Sep 9th	@ SF	Blade Tidwell (1-2)	#312	vs LAA	Ryan Johnson (5-8)	#301
Fri, Sep 11th	vs CWS	Anthony Kay (9-9)	#275	vs KC	Seth Lugo (7-9)	#180
Sat, Sep 12th	vs CWS	Sean Newcomb (2-5)	#139	vs KC	Randy Dobnak (3-4)	#369
Sun, Sep 13th	vs CWS	David Sandlin (2-2)	#283	vs KC	Noah Cameron (9-8)	#92
Mon, Sep 14th	vs SF	Landen Roupp (9-14)	#85
Tue, Sep 15th	vs SF	Blade Tidwell (1-2)	#312	@ TEX	Jacob deGrom (11-9)	#4
Wed, Sep 16th	vs SF	Anthony Molina (3-1)	#313	@ TEX	MacKenzie Gore (8-11)	#38
Fri, Sep 18th	vs WSH	Cade Cavalli (13-5)	#53	@ TB	Ian Seymour (9-7)	#25
Sat, Sep 19th	vs WSH	Andrew Alvarez (2-6)	#98	@ TB	Freddy Peralta (9-11)	#29
Sun, Sep 20th	vs WSH	Jake Irvin (2-9)	#194	@ TB	Griffin Jax (7-10)	#19
Tue, Sep 22nd	@ PIT	Jared Jones (4-6)	#42	vs CLE	Foster Griffin (15-5)	#63
Wed, Sep 23rd	@ PIT	Khristian Curtis (2-0)	#319	vs CLE	Parker Messick (12-9)	#37
Thu, Sep 24th	@ PIT	Paul Skenes (10-11)	#2	vs CLE	Joey Cantillo (10-9)	#72
Fri, Sep 25th	@ MIL	Dustin May (7-9)	#52	vs CHC	Matthew Boyd (9-5)	#36
Sat, Sep 26th	@ MIL	Robert Gasser (5-5)	#109	vs CHC	David Peterson (8-8)	#101
Sun, Sep 27th	@ MIL			vs CHC	Kevin Gausman (9-12)	#21
Thu, Apr 23rd				vs NYY	Cam Schlittler (14-6)	#9
Tue, May 5th				@ DET	Framber Valdez (10-11)	#40
Mon, May 18th				@ KC	Seth Lugo (7-9)	#180
Fri, May 22nd				vs MIN	Connor Prielipp (6-7)	#66
Sun, May 24th				vs MIN	Bailey Ober (7-6)	#99
Thu, May 28th				vs ATL	Chris Sale (14-9)	#6
Thu, Jun 4th				vs BAL	Trevor Rogers (10-11)	#41
Mon, Jun 8th				@ TB	Ian Seymour (9-7)	#25
Sat, Jun 20th				@ SEA	Emerson Hancock (7-8)	#127
Thu, Jun 25th				vs NYY	Cam Schlittler (14-6)	#9
Mon, Jun 29th				vs WSH	Miles Mikolas (3-9)
Thu, Aug 6th				vs CWS	Luis Castillo (4-11)	#86
Thu, Aug 13th				@ TOR	Max Scherzer (3-8)	#108
Mon, Aug 24th				@ MIA	Sandy Alcantara (13-10)	#48
Mon, Aug 31st				vs SEA	George Kirby (9-11)	#22
Thu, Sep 17th				@ TEX	Tyler Alexander (5-2)	#251