Mitch Spence or Riley O'Brien
Baseball Stats Comparison
See which player would win in a trade View Trade Analyzer
| Riley O'Brien RP - STL  | Mitch Spence SP,RP - KC  | |
| 2026 Stats | ||
| Games Played | 25 | 1 |
| Games Started | 0 | 0 |
| Innings Pitched | 25.1 | 4.0 |
| Wins | 3 | 0 |
| Losses | 2 | 0 |
| Saves | 14 | 0 |
| Blown Saves | 4 | 0 |
| Holds | 1 | 0 |
| Hits Allowed | 21 | 4 |
| Earned Runs | 9 | 6 |
| Home Runs Allowed | 1 | 1 |
| Strikeouts | 27 | 3 |
| Walks | 4 | 5 |
| ERA | 3.20 | 13.50 |
| WHIP | 0.99 | 2.25 |
| Riley O'Brien RP - STL | Mitch Spence SP,RP - KC | |
| 2026 Projections | ||
| Games Played | 59 | 25 |
| Games Started | 0 | 2 |
| Innings Pitched | 60.2 | 35.8 |
| Wins | 3 | 2 |
| Losses | 3 | 2 |
| Saves | 14 | 0 |
| Blown Saves | 1 | 0 |
| Holds | 11 | 2 |
| Hits Allowed | 52 | 38 |
| Earned Runs | 26 | 18 |
| Home Runs Allowed | 5 | 5 |
| Strikeouts | 63 | 29 |
| Walks | 27 | 11 |
| ERA | 3.92 | 4.40 |
| WHIP | 1.31 | 1.37 |
| Riley O'Brien RP - STL | Mitch Spence SP,RP - KC | |
| News | ||
| Riley O'Brien allowed one earned run on one hit over one inning to earn the save in Friday's 6-5 win over the Cubs. Chase Davis Sat, May 30th | The Royals have optioned right-hander Mitch Spence to Triple-A Omaha. Brenton Kemp Sun, Apr 19th | |
| Riley O'Brien tossed 1.1 innings, allowing only the Manfred man to score, with two strikeouts and one walk in Saturday's 7-6 loss to the Reds. Chase Davis Sun, May 24th | The Royals recalled RHP Mitch Spence from Triple-A Omaha. Ari Koslow Thu, Apr 9th | |
| Riley O'Brien struck out two batters in a scoreless outing to earn the save in Thursday's 5-4 win over the Athletics. Chase Davis Fri, May 15th | The Royals optioned RHP Mitch Spence to Triple-A Omaha. Ari Koslow Thu, Mar 19th | |
| Riley O'Brien earned the save in Tuesday's 6-4 win over the Athletics, working a scoreless frame while allowing one walk on 13 pitches. Jesse Garcia Wed, May 13th | The Royals acquired Mitch Spence from the Athletics for RHP AJ Causey. Ari Koslow Thu, Feb 12th | |
| Riley O'Brien struck out one batter in a scoreless appearance to earn the save in Thursday's 2-1 win over the Padres. Chase Davis Fri, May 8th | The Athletics have designated right-hander Mitch Spence for assignment. Brenton Kemp Tue, Feb 10th | |
| Notes | ||
| There are no recent notes for these players | ||
| Riley O'Brien RP - STL | Mitch Spence SP,RP - KC | |||||
| Date | Opp | Opp Pitcher | VBR | Opp | Opp Pitcher | VBR |
|---|---|---|---|---|---|---|
| Fri, Mar 27th | @ ATL | Chris Sale (8-3) | #5 | |||
| Sat, Mar 28th | vs TB | Joe Boyle (0-1) | #167 | @ ATL | Reynaldo Lopez (2-1) | #108 |
| Sun, Mar 29th | vs TB | Steven Matz (4-2) | #98 | @ ATL | Grant Holmes (3-2) | #139 |
| Mon, Mar 30th | vs NYM | Clay Holmes (4-4) | #165 | vs MIN | Simeon Woods Richardson (0-7) | #222 |
| Wed, Apr 1st | vs NYM | Freddy Peralta (3-4) | #28 | vs MIN | Joe Ryan (3-3) | #15 |
| Thu, Apr 2nd | vs MIN | Taj Bradley (5-1) | #74 | |||
| Sat, Apr 4th | @ DET | Jack Flaherty (0-7) | #62 | vs MIL | Logan Henderson (2-1) | #57 |
| Sun, Apr 5th | @ DET | Keider Montero (2-3) | #201 | vs MIL | Kyle Harrison (6-1) | #63 |
| Mon, Apr 6th | @ WSH | Zack Littell (4-4) | #169 | @ CLE | Tanner Bibee (0-7) | #38 |
| Tue, Apr 7th | @ WSH | Cade Cavalli (3-3) | #87 | @ CLE | Gavin Williams (8-3) | #27 |
| Wed, Apr 8th | @ WSH | Miles Mikolas (1-4) | #215 | @ CLE | Joey Cantillo (4-2) | #106 |
| Thu, Apr 9th | vs CWS | Anthony Kay (5-1) | #182 | |||
| Fri, Apr 10th | vs BOS | Connelly Early (5-2) | #97 | vs CWS | Davis Martin (8-1) | #79 |
| Sat, Apr 11th | vs BOS | Ranger Suarez (2-3) | #32 | vs CWS | Erick Fedde (0-5) | #373 |
| Sun, Apr 12th | vs BOS | Brayan Bello (2-5) | #144 | vs CWS | Grant Taylor (1-0) | #53 |
| Tue, Apr 14th | vs CLE | Joey Cantillo (4-2) | #106 | @ DET | Framber Valdez (2-4) | #26 |
| Wed, Apr 15th | vs CLE | Slade Cecconi (3-5) | #105 | @ DET | Jack Flaherty (0-7) | #62 |
| Thu, Apr 16th | @ DET | Keider Montero (2-3) | #201 | |||
| Fri, Apr 17th | @ HOU | Peter Lambert (4-4) | #190 | @ NYY | Cam Schlittler (7-2) | #36 |
| Sat, Apr 18th | @ HOU | Lance McCullers Jr. (2-3) | #208 | @ NYY | Will Warren (6-1) | #60 |
| Sun, Apr 19th | @ HOU | Mike Burrows (3-6) | #121 | @ NYY | Ryan Weathers (2-3) | #66 |
| Mon, Apr 20th | @ MIA | Max Meyer (5-0) | #68 | vs BAL | Kyle Bradish (2-6) | #43 |
| Tue, Apr 21st | @ MIA | Chris Paddack (0-7) | #324 | vs BAL | Shane Baz (2-5) | #84 |
| Wed, Apr 22nd | @ MIA | Janson Junk (3-5) | #116 | vs BAL | Chris Bassitt (4-3) | #125 |
| Fri, Apr 24th | vs SEA | George Kirby (5-4) | #14 | vs LAA | Yusei Kikuchi (0-3) | #155 |
| Sat, Apr 25th | vs SEA | Bryan Woo (5-3) | #6 | vs LAA | Walbert Urena (2-4) | #421 |
| Sun, Apr 26th | vs SEA | Emerson Hancock (4-2) | #91 | vs LAA | Reid Detmers (2-5) | #41 |
| Tue, Apr 28th | @ PIT | Braxton Ashcraft (4-2) | #47 | @ ATH | Aaron Civale (5-2) | #219 |
| Wed, Apr 29th | @ PIT | Bubba Chandler (1-6) | #122 | @ ATH | Luis Severino (2-6) | #146 |
| Thu, Apr 30th | @ PIT | Paul Skenes (6-5) | #2 | @ ATH | Jeffrey Springs (3-6) | #111 |
| Fri, May 1st | vs LAD | Emmet Sheehan (3-1) | #42 | @ SEA | Bryan Woo (5-3) | #6 |
| Sat, May 2nd | vs LAD | Roki Sasaki (3-3) | #131 | @ SEA | Emerson Hancock (4-2) | #91 |
| Sun, May 3rd | vs LAD | Justin Wrobleski (7-2) | #130 | @ SEA | Luis Castillo (1-5) | #46 |
| Mon, May 4th | vs MIL | Chad Patrick (2-2) | #148 | vs CLE | Tanner Bibee (0-7) | #38 |
| Tue, May 5th | vs CLE | Gavin Williams (8-3) | #27 | |||
| Wed, May 6th | vs MIL | Brandon Sproat (1-4) | #158 | vs CLE | Joey Cantillo (4-2) | #106 |
| Thu, May 7th | @ SD | Michael King (4-4) | #35 | vs CLE | Slade Cecconi (3-5) | #105 |
| Fri, May 8th | @ SD | Griffin Canning (0-3) | #141 | vs DET | Keider Montero (2-3) | #201 |
| Sat, May 9th | @ SD | Randy Vasquez (5-3) | #199 | vs DET | Burch Smith | |
| Sun, May 10th | @ SD | Walker Buehler (3-3) | #220 | vs DET | Brenan Hanifee | |
| Tue, May 12th | @ ATH | Jeffrey Springs (3-6) | #111 | @ CWS | Erick Fedde (0-5) | #373 |
| Wed, May 13th | @ ATH | J.T. Ginn (3-3) | #127 | @ CWS | Noah Schultz (2-4) | #221 |
| Thu, May 14th | @ ATH | Jacob Lopez (4-2) | #202 | @ CWS | Anthony Kay (5-1) | #182 |
| Fri, May 15th | vs KC | Michael Wacha (4-2) | #78 | @ STL | Dustin May (3-6) | #85 |
| Sat, May 16th | vs KC | Noah Cameron (2-4) | #92 | @ STL | Kyle Leahy (5-3) | #162 |
| Sun, May 17th | vs KC | Stephen Kolek (3-1) | #166 | @ STL | Andre Pallante (5-4) | #163 |
| Mon, May 18th | vs BOS | Sonny Gray (6-1) | #30 | |||
| Tue, May 19th | vs PIT | Mitch Keller (5-2) | #95 | vs BOS | Ranger Suarez (2-3) | #32 |
| Wed, May 20th | vs PIT | Carmen Mlodzinski (4-3) | #132 | vs BOS | Connelly Early (5-2) | #97 |
| Fri, May 22nd | vs SEA | Logan Gilbert (3-4) | #11 | |||
| Sat, May 23rd | @ CIN | Chase Petty (0-0) | #416 | vs SEA | George Kirby (5-4) | #14 |
| Sun, May 24th | vs SEA | Bryan Woo (5-3) | #6 | |||
| Mon, May 25th | @ MIL | Jacob Misiorowski (5-2) | #18 | vs NYY | Will Warren (6-1) | #60 |
| Tue, May 26th | @ MIL | Kyle Harrison (6-1) | #63 | vs NYY | Cam Schlittler (7-2) | #36 |
| Wed, May 27th | @ MIL | Chad Patrick (2-2) | #148 | vs NYY | Gerrit Cole (1-0) | #23 |
| Fri, May 29th | vs CHC | Shota Imanaga (4-6) | #24 | @ TEX | MacKenzie Gore (4-4) | #50 |
| Sat, May 30th | vs CHC | Ben Brown (2-2) | #52 | @ TEX | Kumar Rocker (2-5) | #103 |
| Sun, May 31st | vs CHC | Jordan Wicks (0-1) | #234 | @ TEX | Jack Leiter (2-4) | #76 |
| Mon, Jun 1st | vs TEX | Jacob deGrom (3-4) | #8 | @ CIN | Chase Burns (7-1) | #25 |
| Tue, Jun 2nd | vs TEX | Nathan Eovaldi (5-6) | #20 | @ CIN | Andrew Abbott (4-3) | #99 |
| Wed, Jun 3rd | vs TEX | MacKenzie Gore (4-4) | #50 | @ CIN | Chris Paddack (0-7) | #324 |
| Thu, Jun 4th | @ MIN | Bailey Ober (6-3) | #72 | |||
| Fri, Jun 5th | vs CIN | Brady Singer (2-5) | #143 | @ MIN | Zebby Matthews (1-2) | #82 |
| Sat, Jun 6th | vs CIN | Nick Lodolo (1-1) | #58 | @ MIN | Joe Ryan (3-3) | #15 |
| Sun, Jun 7th | vs CIN | Chase Burns (7-1) | #25 | @ MIN | Connor Prielipp (1-3) | #124 |
| Tue, Jun 9th | @ NYM | Kodai Senga (0-4) | #129 | vs TEX | Nathan Eovaldi (5-6) | #20 |
| Wed, Jun 10th | @ NYM | vs TEX | ||||
| Thu, Jun 11th | @ NYM | vs TEX | ||||
| Fri, Jun 12th | @ MIN | vs HOU | ||||
| Sat, Jun 13th | @ MIN | vs HOU | ||||
| Sun, Jun 14th | @ MIN | vs HOU | ||||
| Mon, Jun 15th | vs SD | @ WSH | ||||
| Tue, Jun 16th | vs SD | @ WSH | ||||
| Wed, Jun 17th | vs SD | @ WSH | ||||
| Thu, Jun 18th | @ KC | vs STL | ||||
| Fri, Jun 19th | @ KC | vs STL | ||||
| Sun, Jun 21st | @ KC | vs STL | ||||
| Mon, Jun 22nd | vs ARI | @ TB | ||||
| Tue, Jun 23rd | vs ARI | @ TB | ||||
| Wed, Jun 24th | vs ARI | @ TB | ||||
| Thu, Jun 25th | vs ARI | @ TB | ||||
| Fri, Jun 26th | vs MIA | @ CWS | ||||
| Sat, Jun 27th | vs MIA | @ CWS | ||||
| Sun, Jun 28th | vs MIA | @ CWS | ||||
| Tue, Jun 30th | @ ATL | vs TB | ||||
| Wed, Jul 1st | @ ATL | vs TB | ||||
| Thu, Jul 2nd | @ ATL | vs TB | ||||
| Sat, Jul 4th | @ CHC | vs PHI | ||||
| Sun, Jul 5th | @ CHC | vs PHI | ||||
| Mon, Jul 6th | vs MIL | vs PHI | ||||
| Tue, Jul 7th | vs MIL | @ NYM | ||||
| Wed, Jul 8th | vs MIL | @ NYM | ||||
| Thu, Jul 9th | vs MIL | @ NYM | ||||
| Fri, Jul 10th | vs ATL | @ BAL | ||||
| Sat, Jul 11th | vs ATL | @ BAL | ||||
| Sun, Jul 12th | vs ATL | @ BAL | ||||
| Fri, Jul 17th | @ ARI | vs SD | ||||
| Sat, Jul 18th | @ ARI | vs SD | ||||
| Sun, Jul 19th | @ ARI | vs SD | ||||
| Mon, Jul 20th | @ LAA | vs SF | ||||
| Tue, Jul 21st | @ LAA | vs SF | ||||
| Wed, Jul 22nd | @ LAA | vs SF | ||||
| Thu, Jul 23rd | @ DET | |||||
| Fri, Jul 24th | vs CIN | @ DET | ||||
| Sat, Jul 25th | vs CIN | @ DET | ||||
| Sun, Jul 26th | vs CIN | @ DET | ||||
| Tue, Jul 28th | vs CHC | @ MIN | ||||
| Wed, Jul 29th | vs CHC | @ MIN | ||||
| Thu, Jul 30th | vs CHC | @ MIN | ||||
| Fri, Jul 31st | @ TOR | @ COL | ||||
| Sat, Aug 1st | @ TOR | @ COL | ||||
| Sun, Aug 2nd | @ TOR | @ COL | ||||
| Tue, Aug 4th | @ NYY | vs MIN | ||||
| Wed, Aug 5th | @ NYY | vs MIN | ||||
| Thu, Aug 6th | vs MIN | |||||
| Fri, Aug 7th | vs COL | vs CHC | ||||
| Sat, Aug 8th | vs COL | vs CHC | ||||
| Sun, Aug 9th | vs COL | vs CHC | ||||
| Mon, Aug 10th | vs PHI | @ LAD | ||||
| Tue, Aug 11th | vs PHI | @ LAD | ||||
| Wed, Aug 12th | vs PHI | @ LAD | ||||
| Fri, Aug 14th | @ CHC | @ LAA | ||||
| Sat, Aug 15th | @ CHC | @ LAA | ||||
| Sun, Aug 16th | @ CHC | @ LAA | ||||
| Mon, Aug 17th | @ CIN | vs ATH | ||||
| Tue, Aug 18th | @ CIN | vs ATH | ||||
| Wed, Aug 19th | @ CIN | vs ATH | ||||
| Thu, Aug 20th | @ CIN | vs ATH | ||||
| Fri, Aug 21st | @ PHI | vs DET | ||||
| Sat, Aug 22nd | @ PHI | vs DET | ||||
| Sun, Aug 23rd | @ PHI | vs DET | ||||
| Tue, Aug 25th | vs BAL | @ TOR | ||||
| Wed, Aug 26th | vs BAL | @ TOR | ||||
| Thu, Aug 27th | vs BAL | @ TOR | ||||
| Fri, Aug 28th | vs PIT | @ CLE | ||||
| Sat, Aug 29th | vs PIT | @ CLE | ||||
| Sun, Aug 30th | vs PIT | @ CLE | ||||
| Tue, Sep 1st | @ LAD | vs MIA | ||||
| Wed, Sep 2nd | @ LAD | vs MIA | ||||
| Thu, Sep 3rd | @ LAD | vs MIA | ||||
| Fri, Sep 4th | @ COL | vs TOR | ||||
| Sat, Sep 5th | @ COL | vs TOR | ||||
| Sun, Sep 6th | @ COL | vs TOR | ||||
| Mon, Sep 7th | @ SF | vs ARI | ||||
| Tue, Sep 8th | @ SF | vs ARI | ||||
| Wed, Sep 9th | @ SF | vs ARI | ||||
| Fri, Sep 11th | vs CWS | @ BOS | ||||
| Sat, Sep 12th | vs CWS | @ BOS | ||||
| Sun, Sep 13th | vs CWS | @ BOS | ||||
| Tue, Sep 15th | vs SF | @ HOU | ||||
| Wed, Sep 16th | vs SF | @ HOU | ||||
| Thu, Sep 17th | @ HOU | |||||
| Fri, Sep 18th | vs WSH | @ PIT | ||||
| Sat, Sep 19th | vs WSH | @ PIT | ||||
| Sun, Sep 20th | vs WSH | @ PIT | ||||
| Tue, Sep 22nd | @ PIT | vs CWS | ||||
| Wed, Sep 23rd | @ PIT | vs CWS | ||||
| Thu, Sep 24th | @ PIT | vs CWS | ||||
| Fri, Sep 25th | @ MIL | vs CLE | ||||
| Sat, Sep 26th | @ MIL | vs CLE | ||||
| Sun, Sep 27th | @ MIL | vs CLE | ||||
| Thu, Mar 26th | vs TB | Drew Rasmussen (4-2) | #21 | |||
| Tue, Mar 31st | vs NYM | Kodai Senga (0-4) | #129 | |||
| Fri, Apr 3rd | @ DET | Framber Valdez (2-4) | #26 | |||
| Mon, Apr 13th | vs CLE | Gavin Williams (8-3) | #27 | |||
| Mon, Apr 27th | @ PIT | Mason Montgomery (1-1) | #151 | |||
| Thu, May 21st | vs PIT | Braxton Ashcraft (4-2) | #47 | |||
| Fri, Jul 3rd | @ CHC | |||||
| Mon, Jul 27th | vs CHC | |||||
| Mon, Aug 3rd | @ NYY | |||||
| Mon, Sep 14th | vs SF | |||||
