Mason Miller

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Mason Miller
San Diego Padres – No. 22
Pitcher
Born: (1998-08-24) August 24, 1998 (age 27)
Pittsburgh, Pennsylvania, U.S.
Bats: Right
Throws: Right
MLB debut
April 19, 2023, for the Oakland Athletics
MLB statistics
(through 2025 season)
Win–loss record3–7
Earned run average2.81
Strikeouts246
Saves50
Stats at Baseball Reference Edit this at Wikidata
Teams
Career highlights and awards

Mason James Miller (born August 24, 1998) is an American professional baseball pitcher for the San Diego Padres of Major League Baseball (MLB). He has previously played in MLB for the Oakland Athletics / Athletics. He made his MLB debut in 2023, and was an All-Star selection in 2024.

Amateur career

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Miller played for Bethel Park High School in Bethel Park, Pennsylvania, while being homeschooled, and played college baseball at Waynesburg University for four years until he graduated. He then played for Gardner-Webb University for his fifth year as a graduate student.[1][2][3] As a sophomore at Waynesburg, he was diagnosed with Type 1 diabetes.[4][5]

Professional career

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Minor leagues

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The Oakland Athletics selected Miller in the third round of the 2021 Major League Baseball draft.[6][7] He made his professional debut that year with the Arizona Complex League Athletics. In 2022, Miller pitched in only six games between the ACL Athletics, Lansing Lugnuts and Las Vegas Aviators. After the season, he played in the Arizona Fall League.[8]

Miller began the 2023 season with the Double-A Midland RockHounds, starting one game for the team before being moved up to Triple-A Las Vegas. After one start in Triple-A, on April 18, 2023, with 11 strikeouts over 5 perfect innings, the Athletics announced that Miller would be promoted to the major leagues for the first time.[9]

Oakland Athletics / Athletics

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2023

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Miller made his debut a day later, April 19, 2023, in a game against the Chicago Cubs. He pitched 41⁄3 innings, allowing two runs on four hits, a walk, and five strikeouts.[10] Miller also became the 10th starting pitcher since the debut of Statcast to throw 15 pitches above 100 miles per hour (160 km/h).[11] After a May 8 start against the Kansas City Royals,[12] it was reported that Miller was dealing with elbow tightness.[13] He was later diagnosed with a mild sprain of the ulnar collateral ligament in his throwing elbow and promptly shut down from throwing.[14] On June 30, he was transferred to the 60-day injured list.[15] On September 6, Miller was activated from the injured list, with manager Mark Kotsay noting that he would be slated for a relief role.[16] Miller finished the 2023 season with a 3.78 ERA in 10 games, 6 of which were starts.[17]

2024: Rookie season & All-Star

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In an effort to maintain Miller's health, the A's announced that Miller would be a reliever during the 2024 season.[18] Beginning the season as the team's closer, Miller earned his first career save in a 4–3 win at Texas on April 9.[19] Miller was named MLB Reliever of the Month for April 2024 after earning 8 saves in 8 opportunities and 28 total strikeouts.[20]

On July 7, 2024, Miller was named as a reserve player in the 2024 Major League Baseball All-Star Game, having recorded a 2.39 ERA with 14 saves and 66 strikeouts (leading all AL relievers) up to that point.[21][22] During the All-Star Game, Miller recorded a scoreless fifth inning with two strikeouts, ultimately earning the win as the American League beat the National League 5–3. During that inning he threw the fastest pitch in All-Star Game history, a 103.6 MPH fastball to Trea Turner.[23]

On September 26, 2024, Miller became the last pitcher to throw a pitch at the Oakland Coliseum in a major league game.[24] He closed out the 3–2 victory over the Texas Rangers with a groundout from Travis Jankowski, recording his 28th save of the year, and the franchises' final win in Oakland. During this outing, Miller set the new franchise record for saves recorded by a rookie with 28, and threw the fastest pitch in Oakland Coliseum history, at 103.8 MPH.[25]

Miller finished the 2024 season with a 2.49 ERA, 28 saves, and 104 strikeouts across 55 games.[17] He was named to the All-MLB Second Team, and finished fourth in AL Rookie of the Year voting.[26][27]

2025

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On April 12, 2025, Miller recorded the Athletics' first save at Sutter Health Park in Sacramento, after throwing a scoreless 9th inning to close out a 3–1 victory over the New York Mets.[28] Miller recorded a 3.76 ERA with 20 saves and 59 strikeouts across 38 games for the Athletics in 2025.[17]

San Diego Padres

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On July 31, 2025, the Athletics traded Miller and JP Sears to the San Diego Padres in exchange for Leo De Vries, Braden Nett, Eduarniel Núñez and Henry Baez.[29][30] On August 6, Miller recorded his first save as a Padre, striking out all three batters in the 9th inning to close out a 3–2 victory over the Arizona Diamondbacks.[31] On September 3, in the eighth inning versus the Baltimore Orioles, Miller became just the second Padre to pitch an immaculate inning, striking out Jeremiah Jackson, Ryan Mountcastle, and Emmanuel Rivera, on nine consecutive sliders.[32] Miller ended his year with the Padres with a 0.77 ERA, 2 saves in 3 opportunities, and 45 strikeouts in 22 games.[17]

Miller finished the 2025 season with a 2.63 ERA, 22 saves, and 104 strikeouts across 60 games between the Athletics and Padres.[17] In Game 1 of the 2025 National League Wild Card Series against the Chicago Cubs, Miller made his first postseason appearance, striking out all three batters in the seventh inning. The Cubs won the game 3–1.[33]

Personal life

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Miller is an Eagle Scout.[34] He grew up as a fan of the Pittsburgh Pirates.[35]

References

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  1. ^ "Bethel Park's Miller takes talents to Gardner-Webb".
  2. ^ Conley, Jacob (May 22, 2021). "Gardner-Webb pitcher Mason Miller receiving attention from MLB scouts". Shelby Star. Retrieved November 25, 2025.
  3. ^ "Bethel Park's Mason Miller evolving into legitimate MLB prospect at Gardner-Webb".
  4. ^ "Waynesburg pitcher striking out opponents, including diabetes".
  5. ^ "Mason Miller drafted in third round by Oakland".
  6. ^ "3rd-round pick Miller a tale of perseverance". MLB.com.
  7. ^ "Bethel Park's Mason Miller taken in 3rd round of MLB draft by Athletics". July 12, 2021.
  8. ^ "A's prospect Mason Miller riding a 100-MPH fastball into the AFL spotlight".
  9. ^ "Athletics' Mason Miller: MLB debut imminent". cbssports.com. Retrieved April 18, 2023.
  10. ^ "Cubs 12, Athletics 2 Final Score (04/19/2023) on MLB Gameday". MLB.com. Retrieved April 21, 2023.
  11. ^ "Miller hits triple-digits 15 times in electrifying debut". MLB.com. Retrieved April 21, 2023.
  12. ^ "Athletics' Mason Miller: Handed loss No. 2". cbssports.com. Retrieved May 18, 2023.
  13. ^ "Athletics' Mason Miller: Dealing with elbow tightness". cbssports.com. Retrieved May 18, 2023.
  14. ^ "Athletics' Mason Miller: Has mild UCL sprain". cbssports.com. Retrieved May 18, 2023.
  15. ^ "Athletics' Mason Miller: Moved to 60-day IL". cbssports.com. Retrieved June 30, 2023.
  16. ^ "Athletics' Mason Miller: Activated, but slated for relief". cbssports.com. Retrieved September 6, 2023.
  17. ^ a b c d e "Mason Miller Stats, Height, Weight, Position, Rookie Status & More". Baseball-Reference.com. Retrieved September 17, 2025.
  18. ^ Burke, Jason (December 5, 2023). "A's Mason Miller Moving to Bullpen in 2024". Sports Illustrated.
  19. ^ "Athletics' Mason Miller: Locks down first career save". CBSSports.com. April 10, 2024.
  20. ^ Delos Santos, Justice (May 3, 2024). "Mason Miller wins American League Reliever of the Month". The Mercury News.
  21. ^ "Mason Miller named American League All-Star". MLB.com. Retrieved September 17, 2025.
  22. ^ "Mason Miller ('20) selected to MLB All-Star game". Waynesburg University Athletics. July 23, 2025. Retrieved September 17, 2025.
  23. ^ "Mason Miller lights up All-Star Game, K's Ohtani AND throws 103.6 mph". MLB.com. Retrieved September 17, 2025.
  24. ^ "Texas Rangers vs Oakland Athletics Box Score: September 26, 2024". Baseball Reference. Retrieved September 29, 2024.
  25. ^ Joseph, Andrew. "A's closer Mason Miller amazingly threw the fastest pitch in Oakland Coliseum history in the stadium's final at-bat". For The Win. Retrieved September 17, 2025.
  26. ^ "A's RHP Mason Miller named to All-MLB Second Team". MLB.com. Retrieved September 17, 2025.
  27. ^ "2024 Awards Voting". Baseball-Reference.com. Retrieved September 17, 2025.
  28. ^ "New York Mets vs Athletics Box Score: April 12, 2025". Baseball-Reference.com. Retrieved September 17, 2025.
  29. ^ Cassavell, AJ (July 31, 2025). "Padres land closer Mason Miller, LHP Sears from A's for No. 3 prospect De Vries, more". MLB.com. Retrieved July 31, 2025.
  30. ^ Olney, Buster (July 31, 2025). "Padres add hard-throwing A's closer Mason Miller to bullpen". ESPN.com. Retrieved July 31, 2025.
  31. ^ "Padres' Mason Miller: Gets first save as Padre". CBSSports.com. August 7, 2025. Retrieved September 17, 2025.
  32. ^ Cassavell, AJ (September 3, 2025). "Mason Miller wipes out O's on 9 straight sliders in immaculate inning". MLB.com.
  33. ^ Bastian, Jordon (September 30, 2025). "Sizzling Seiya sparks Cubs to Game 1 win at raucous Wrigley". MLB.com. Retrieved September 30, 2025.
  34. ^ Destin, Andrew (April 19, 2023). "How Bethel Park's Mason Miller has overcome all odds to make the school's first MLB debut". Pittsburgh Post-Gazette.
  35. ^ Gallegos, Martín (October 8, 2024). "Young diabetics finding a champion in A's star closer". MLB.com.
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Awards and achievements
Preceded by American League Reliever of the Month
April 2024 		Succeeded by
Preceded by National League Reliever of the Month
September 2025 		Succeeded by
Most recent