Mason Miller is an American professional baseball pitcher for the San Diego Padres of Major League Baseball. He is known for one of the fastest fastballs in baseball. Before joining San Diego, he became an All-Star closer with the Athletics.
| Fact | Details |
|---|---|
| Full name | Mason James Miller |
| Born | August 24, 1998, Pittsburgh, Pennsylvania |
| Age | 28 as of October 1, 2026 |
| Position | Right-handed relief pitcher |
| Current team | San Diego Padres, No. 22 |
| College | Gardner-Webb University |
| MLB debut | April 19, 2023 |
| 2026 salary | $4 million |
Who Is Mason Miller?
Mason James Miller is a 6-foot-5 right-handed relief pitcher. He first reached MLB with Oakland in 2023 and later became one of baseball’s top closers.
Miller joined the Padres on July 31, 2025. His fastball is a major part of his success. During the 2025 regular season, he averaged 101.2 mph with his fastball and had a 44.4% strikeout rate.
By late September 2026, Miller remained one of San Diego’s main late-inning pitchers and was also a nominee for the 2026 All-MLB Team.
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Early Life and College
Miller was born in Pittsburgh, Pennsylvania, on August 24, 1998. He played college baseball at Gardner-Webb University in Boiling Springs, North Carolina.
There is limited verified public information about his childhood and family life.
Oakland selected Miller in the third round of the 2021 MLB Draft with the 97th overall pick. He entered professional baseball after his college career.
How Miller Became an MLB Closer
Miller made his MLB debut for the Athletics on April 19, 2023. His first season was affected by a right-elbow injury. Reports said he avoided Tommy John surgery and returned in September as a bullpen pitcher.
Moving to the bullpen helped Miller focus his high velocity in shorter outings. He stayed in a relief role after that change.
In 2024, Miller became an All-Star with Oakland. He continued to build his name as one of the American League’s top late-inning pitchers.
In 2025, he appeared in 60 games, recorded 22 saves, had a 2.63 ERA, and struck out 104 batters in 61 2/3 innings.
The 2025 Trade to San Diego
On July 31, 2025, the Athletics traded Miller and left-handed pitcher J.P. Sears to the San Diego Padres.
Oakland received shortstop Leo De Vries, right-handers Braden Nett, Henry Báez, and Eduarniel Núñez. At the time of the trade, De Vries was MLB Pipeline’s No. 3 overall prospect.
The trade gave San Diego an All-Star-level closer while Oakland received several young players for the future.
Miller also made baseball history in the 2025 postseason. In Game 2 of the National League Wild Card Series against the Chicago Cubs, he threw a 104.5 mph fastball to strike out Carson Kelly. It was the fastest tracked pitch in MLB postseason history since pitch tracking began in 2008.
What Makes Mason Miller Special?
Miller’s fastball speed is one of his biggest strengths. His average fastball speed was 101.2 mph during the 2025 regular season.
He also had a 44.4% strikeout rate and a 45.2% whiff rate. Both figures ranked in the 100th percentile among MLB pitchers.
Miller reached 104.1 mph during the 2025 regular season. His 104.5 mph pitch in the playoffs became the fastest pitch of his MLB career.
His success is not based only on speed. He also gets many hitters to swing and miss.
Mason Miller’s 2026 Season
Miller entered the 2026 season as one of San Diego’s main high-leverage relievers. In July, he was named the Padres’ sole All-Star representative.
At the time of his selection, Miller had a 0.78 ERA and 21 saves, which tied him for the National League lead.
He finished the 2026 regular season with 66 appearances, a 1.67 ERA, 70 innings pitched, 129 strikeouts, a 0.90 WHIP, and a 5-2 record. He also finished with 38 saves, which tied him for the National League lead.
Miller was later named a nominee for the 2026 All-MLB Team. He had previously earned second-team All-MLB honors in 2025.
Contract and Net Worth
Miller agreed to a one-year, $4 million contract with the Padres for the 2026 season. This was his first arbitration year.
Miller is a Super Two player. This means he has three more years of arbitration eligibility before he can reach free agency after the 2029 season.
There is no reliable public figure that confirms Mason Miller’s personal net worth. His verified 2026 salary is $4 million. Estimates that include future earnings, taxes, investments, and endorsements should be treated carefully.
Personal Life
Most public reports about Miller focus on his baseball career.
Reliable public sources do not provide enough verified information about a spouse, children, or other private family relationships. For that reason, those parts of his personal life are not included here.
What Mason Miller Is Doing Now
As of October 2026, Miller is an active right-handed reliever for the San Diego Padres and wears No. 22.
He finished the 2026 regular season with a 1.67 ERA, 129 strikeouts, and 38 saves. He was also a 2026 All-Star and a nominee for the 2026 All-MLB Team.
The 2026 All-MLB Team announcement is scheduled for November 11 at the fourth annual MLB Awards in Las Vegas.
How old is Mason Miller?
Mason Miller is 28 years old as of October 1, 2026. He was born on August 24, 1998.
Where is Mason Miller from?
He was born in Pittsburgh, Pennsylvania.
What team does Mason Miller play for?
He plays for the San Diego Padres. He previously played for the Oakland Athletics.
How fast does Mason Miller throw?
His fastest recorded MLB pitch is 104.5 mph. He threw it during the 2025 postseason. His average fastball speed during the 2025 regular season was 101.2 mph.
What is Mason Miller’s salary?
Miller has a one-year, $4 million contract with the Padres for the 2026 season.
Is Mason Miller an All-Star?
Yes. He was an All-Star with Oakland in 2024 and again with San Diego in 2026.
The Bottom Line
Mason Miller’s MLB career changed after he moved from a starting role to the bullpen. His high velocity and ability to strike out hitters helped him become an All-Star closer.
With the Padres, Miller has continued to produce at a high level. His 2026 season included 38 saves, a 1.67 ERA, 129 strikeouts, and another All-Star selection.
Sources
Mason Miller Stats, Height, Weight, Position, Rookie Status …
Mason Miller Stats, Age, Position, Height, … – MLB.com
