| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 1 | 2 | 20 | 5 | 58.0 | 30 | 24 | 93 | 17 | 2.69 | 0.919 | 45.0 |
| 2026 | 2 | 1 | 26 | 0 | 42.7 | 21 | 15 | 79 | 4 | 0.84 | 0.844 | 106.5 |
| 2025 | 1 | 2 | 22 | 10 | 61.7 | 28 | 28 | 104 | 18 | 2.63 | 0.908 | 59.9 |
| 2024 | 2 | 2 | 28 | 0 | 65.0 | 35 | 21 | 104 | 18 | 2.49 | 0.862 | 70.7 |
| Date | News |
| 7/25/26 | Trade rumors: Mason Miller suitors, Skubal, Rays, Red Sox. No content provided Source: https://www.mlb.com/news/mlb-trade-rumors-and-2026... |
| 7/24/26 | MLB trade deadline: Assessing Mariners’ options, including Mason Miller, Spencer Steer. Here's what we're hearing about the Mariners' approach and possible targets ahead of the MLB trade deadline. Source: https://www.seattletimes.com/sports/mariners/mlb-t... |
| 7/13/26 | The heat is on: The average MLB fastball velocity is up for the 6th straight year to 94.7 mph. Major league pitchers are throwing harder than ever. Four-seam fastballs averaged 94.7 mph through Saturday, up from 94.5 mph last year, 93.7 mph in 2021 and 91.9 mph when Major League Baseball first started tracking in 2008. The average was 94.4 mph for the first half of 2025, and this year’s final figure could increase by a tick. Six pitchers are at 100 mph in average four-seam velocity led by a pair of relievers, the Athletics’ Mason Miller (101.3 mph) and the Los Angeles Dodgers’ Edgardo Henriquez (100.6 mph). Source: https://www.chron.com/sports/article/the-heat-is-o... |
| 7/09/26 | Trade rumors: Braves, Mason Miller, Rays-Yanks bidding war?. No content provided Source: https://www.mlb.com/news/mlb-trade-rumors-and-2026... |
| 6/24/26 | [On SI] - Athletics Could Land the Next Mason Miller at Pick Eight. The next star flamethrower could join the A's organization in the draft in a few weeks. Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
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