Mason Miller

Mason Miller

27-Year-Old PitcherRP
San Diego Padres
2026 Fantasy Outlook
The Padres once again made the biggest splash on the relief market at the 2025 trade deadline, acquiring Miller from the Athletics. The 27-year-old brought closing experience with him to San Diego, but he recorded only two of the team's 13 saves over the final two months of the season with Robert Suarez anchoring the club in that role. With Suarez recently opting out of his contract to become a free-agent, Miller is the natural choice to slide into San Diego's closer role. However, the Padres aren't ruling out giving him an opportunity to start, particularly if they lose both Dylan Cease and Michael King in free agency. Miller has been a full-time reliever the last two seasons and has been arguably the best bullpen arm in the game during that span, collecting a 2.56 ERA, 0.89 WHIP and 43.1 percent strikeout rate over 126.2 innings. Last year, his slider limited opposing hitters to a league-best .108 BAA and 54.6 percent whiff rate for that pitch type. Read Past Outlooks
RANKS
Rest of Season From Preseason
#37
ADP
Signed a one-year, $4 million contract with the Padres in January of 2026.
Converts 18th save
PSan Diego Padres
June 6, 2026
Miller allowed a walk and struck out one in a scoreless and hitless inning to earn the save in Saturday's 3-2 win over the Mets.
Analysis
Miller allowed a run in a non-save situation Friday, but he was strong when he needed to be Saturday. Over his last nine appearances (9.1 innings), he has a 17:9 K:BB, though the recent lack of control has yet to lead to a blown save for him. He's converted all 18 of his save opportunities so far while pitching to a 1.01 ERA, 0.90 WHIP and 51:12 K:BB through 26.2 innings. Considering Miller has pitched consecutive days, Jason Adam or Adrian Morejon may be called upon for a save chance if one comes up Sunday.
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Pitching Stats
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2026 MLB Game Log
2026
2025
2024
2023
2026 MLB Game Log
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2025 MLB Game Log
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2024 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
17
Last 10 Games
22
Last 5 Games
19
How many pitches does Mason Miller generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Mason Miller generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2024
 
 
-16%
BAA vs RHP
2026
 
 
-65%
BAA vs RHP
2025
 
 
-25%
BAA vs RHP
2024
 
 
-15%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .160 270 114 35 37 3 1 7
Since 2024vs Right .134 320 148 26 39 5 1 4
2026vs Left .188 56 24 8 9 0 0 0
2026vs Right .065 51 30 4 3 0 0 0
2025vs Left .163 102 39 18 13 1 1 4
2025vs Right .123 132 65 10 15 2 1 1
2024vs Left .146 112 51 9 15 2 0 3
2024vs Right .172 137 53 12 21 3 0 3
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2024
 
 
-16%
ERA at Home
2026
 
 
-100%
ERA on Road
2025
 
 
-35%
ERA at Home
2024
 
 
-18%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2024Home 2.09 0.82 82.0 4 1 31 15.3 3.0 0.4
Since 2024Away 2.49 0.97 72.1 0 4 37 15.3 4.2 0.9
2026Home 1.69 0.94 16.0 1 1 9 18.0 4.5 0.0
2026Away 0.00 0.77 11.2 0 0 9 17.0 3.1 0.0
2025Home 2.12 0.85 34.0 1 0 9 15.1 2.6 0.8
2025Away 3.25 0.98 27.2 0 2 13 15.3 5.9 0.7
2024Home 2.25 0.72 32.0 2 0 13 14.1 2.5 0.3
2024Away 2.73 1.03 33.0 0 2 15 14.7 3.3 1.4
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Stat Review
How does Mason Miller compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
4.50
 
K/9
17.6
 
BB/9
3.9
 
HR/9
0.0
 
Fastball
101.0 mph
 
ERA
0.98
 
WHIP
0.87
 
BABIP
.333
 
GB/FB
2.30
 
Left On Base
83.3%
 
Exit Velocity
78.8 mph
 
Barrels/BBE
0.0%
 
Spin Rate
2458 rpm
 
Balls Hit 95+ MPH
9.0%
 
Swinging Strike
20.8%
 
Prospect Rankings History
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Mason Miller See More
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Past Fantasy Outlooks
2025
2024
2023
Miller made six starts in 2023, but durability issues raised questions about his role entering the 2024 campaign. However, an outstanding spring of one-inning appearances carved a logical path for the 25-year-old to become the Athletics closer. The right-hander tallied the A's first save of the season and never looked back, averaging 100.9 mph on his 4-seamer while blowing away opposing hitters at a league-leading 41.8 percent clip. Miller also led qualified relievers with a remarkable 33.3 K-BB percentage. Perhaps most importantly, the hurler remained healthy for the most part, only missing a few weeks on the IL with a fractured pinkie on his non-throwing hand. The injury risk remains, but Athletics general manager David Forst recently indicated that the team is not considering moving Miller back into a starting role. His upside warrants a pick as a top-7 closer for 2025 drafts.
The three most fantasy-relevant aspects of Miller's profile are his off-the-charts injury risk, his truly elite stuff and his team context: great home park, horrific run support. Of pitchers who will enter spring training healthy, it would be hard to find anyone more likely to get injured during spring training than Miller. A shoulder injury limited him to 30.2 innings (including the Arizona Fall League) as a 23-year-old in 2022 - his first full pro season. A UCL sprain limited him to 52.2 innings in 2023, and he has only topped 60 innings twice dating back to college, logging 67.2 innings in 2019 and 98.2 innings in 2021, in part because of a Type 1 diabetes diagnosis. The fact he can touch 102 mph with his fastball only adds to the injury risk. He threw five-plus innings in three of his 17 appearances last year, and he didn't throw more than three innings in any of his 11 post-injury appearances. As scary as his durability track record is, his stuff is equally scary for opposing batters. In addition to his 80-grade fastball, he throws a mid-90s cutter, an upper-80s slider and a low-90s changeup. There are reports that the 25-year-old flamethrower could be used as a high-leverage reliever this year due to his durability issues, but this team is arguably the worst in baseball for pitcher wins and saves.
Miller touched triple digits in spring training 2022, but a subsequent shoulder strain sidelined him for the first five months of the season. The 6-foot-5 righty got healthy in time to generate buzz after returning (25:3 K:BB in 14 innings at the complex, High-A and Triple-A) and in the Arizona Fall League (20:4 K:BB in 16.2 innings). He now touches 102 mph with the heater while sitting in the upper-90s. Miller's slider, cutter and changeup (in that order) all show promise, so it's mostly a matter of him proving he can handle a starter's workload. The third-round pick from 2021 turns 25 in August and has logged 36.2 innings in pro ball (including the AFL). This season will be about building up his innings while refining his secondaries in the upper levels of the minors.
More Fantasy News
Battles control in 17th save
PSan Diego Padres
May 30, 2026
Miller walked two and struck out two in 1.1 scoreless innings Friday to record his 17th save of the season in a 7-5 win over the Nationals.
Analysis
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Clean inning for save
PSan Diego Padres
May 23, 2026
Miller struck out two in a perfect inning to earn the save in Saturday's 2-0 win over the Athletics.
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Locks in for 15th save
PSan Diego Padres
May 18, 2026
Miller picked up the save Monday against the Dodgers. He allowed no hits and two walks while striking out one over a scoreless inning.
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Flirts with danger in save
PSan Diego Padres
May 15, 2026
Miller allowed two hits and a walk while striking out four over 1.1 scoreless innings to earn the save in Friday's 2-0 win over the Mariners.
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Nails down 13th save
PSan Diego Padres
May 13, 2026
Miller secured the save Wednesday against the Brewers, allowing no runs on one hit and no walks in the ninth inning. He struck out two.
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Latest Fantasy Rumors
Earns award once again
PSan Diego Padres
June 3, 2026
Miller has been named the National League Reliever of the Month for May, according to Theo DeRosa of MLB.com.
Analysis
Miller also won the honor in September last year and March/April 2026, so he's earned this award for a third consecutive time. That's for good reason, though, since the star closer didn't allow a single earned run across nine appearances and 9.2 innings in May while posting an impressive 18.6 K/9. On the season, Miller has gone 17-for-17 in save chances while sporting a 0.72 ERA, 0.84 WHIP and 49 strikeouts in 25 innings.
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