Miles Mastrobuoni
Third Baseman · Career Stats, Bio & Records (2022-2026)
Miles Mastrobuoni is a third baseman who has played in Major League Baseball since 2022 for the Tampa Bay Rays, the Chicago Cubs, and the Seattle Mariners, a span of 5 seasons. In 208 career games, he has hit .228 with 97 hits, 2 home runs, and 22 RBI.
- AVG (Batting Average):
- Hits divided by at bats. .300 is the traditional mark of an excellent hitter.
- HR (Home Runs):
- Hits on which the batter circled the bases and scored, almost always by clearing the outfield fence.
- RBI (Runs Batted In):
- Runs that scored as a direct result of a batter's plate appearance.
- OPS (On-Base Plus Slugging):
- On-base percentage plus slugging percentage, the quickest single summary of offensive value. .900 or better is star-level.
Data updated
PIV is computed through the 2025 season, so it does not yet include 2026. Every other career total on this page includes 2026 through October 25, 2026.
- Position
- Third Baseman
- Bats / Throws
- L / R
- Height / Weight
- 5'11" / 185 lb
- MLB Debut
- 2022-09-22
- Jersey
- #21
Full name: Miles James Mastrobuoni
Career Batting Statistics
| G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | OBP | SLG | OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 208 | 425 | 57 | 97 | 12 | 0 | 2 | 22 | 22 | 40 | 94 | .228 | .293 | .271 | .563 | -1,135 |
Career AVG .228 vs. league average .245 across their career seasons — 6.7% below league average.
Career OBP .293 vs. league average .315 across their career seasons — 7.2% below league average.
Career SLG .271 vs. league average .403 across their career seasons — 32.8% below league average.
Career OPS .563 vs. league average .718 across their career seasons — 21.5% below league average.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | TBA | AL | 8 | 16 | 1 | 3 | 0 | 0 | 0 | 0 | 1 | 1 | 6 | .188 | — | — | — | — | 0.0 |
| 2023 | CHN | NL | 61 | 133 | 24 | 32 | 5 | 0 | 1 | 5 | 13 | 13 | 32 | .241 | .248 (-3%) | .320 (-4%) | .414 (-27%) | .734 (-17%) | -334.1 |
| 2024 | CHN | NL | 50 | 98 | 9 | 19 | 3 | 0 | 0 | 4 | 2 | 7 | 17 | .194 | .243 (-20%) | .312 (-21%) | .399 (-44%) | .711 (-34%) | -518.1 |
| 2025 | SEA | AL | 76 | 152 | 20 | 38 | 4 | 0 | 1 | 12 | 6 | 17 | 29 | .250 | .245 (+2%) | .315 (+3%) | .403 (-27%) | .718 (-14%) | -282.3 |
| 2026 | SEA | AL | 13 | 26 | 3 | 5 | 0 | 0 | 0 | 1 | 0 | 2 | 10 | .192 | — | — | — | — | 0 |
| Career · 5 seasons | 208 | 425 | 57 | 97 | 12 | 0 | 2 | 22 | 22 | 40 | 94 | .228 | — | — | — | — | -1,135 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | CHN | NL | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 4 | 0 | 0 | 108.00 | — | 0.0 |
| 2025 | SEA | AL | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 2 | 0 | 0.00 | — | 0.0 |
| Career · 2 seasons | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 1.1 | 5 | 4 | 2 | 0 | 27.00 | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Game Log & Splits
View full game log (197 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 98 | 210 | 28 | 47 | 1 | 8 | .224 |
| Away | 97 | 189 | 26 | 45 | 1 | 13 | .238 |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Away | 2 | 1.1 | 5 | 4 | 2 | 0 | 27.00 |
Last 10 Games — Batting
| Date | Tm | Opp | Res | AB | R | H | 2B | 3B | HR | RBI | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025-09-28 | SEA | LAD | L | 3 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |
| 2025-08-07 | SEA | CHW | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-08-05 | SEA | CHW | W | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-08-02 | SEA | TEX | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-08-01 | SEA | TEX | W | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-07-23 | SEA | MIL | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-07-20 | SEA | HOU | L | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 1 | 0 |
| 2025-07-19 | SEA | HOU | W | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2025-07-11 | SEA | DET | W | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-07-10 | SEA | NYY | L | 4 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 2 |
Last 2 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-06-26 | SEA | MIN | — | 1.0 | 1 | 0 | 0 | 2 | 0 | 0 |
| 2023-05-14 | CHC | MIN | — | 0.1 | 4 | 4 | 4 | 0 | 0 | 1 |
Fielding Statistics
Career Fielding Totals by Position
| Position | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|
| 1B | 1 | 1 | 6 | 0 | 0 | 0 |
| 2B | 38 | 25 | 36 | 55 | 1 | 10 |
| 3B | 73 | 54 | 31 | 101 | 4 | 7 |
| OF | 38 | 17 | 41 | 0 | 0 | 0 |
| P | 2 | 0 | 0 | 0 | 0 | 0 |
| SS | 14 | 6 | 14 | 26 | 2 | 6 |
Season-by-Season Fielding
| Year | Team | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|---|
| 2022 | TBA | 2B | 6 | 4 | 7 | 7 | 0 | 2 |
| 2022 | TBA | OF | 3 | 0 | 7 | 0 | 0 | 0 |
| 2023 | CHN | 2B | 7 | 5 | 8 | 8 | 0 | 2 |
| 2023 | CHN | 3B | 29 | 24 | 13 | 45 | 2 | 3 |
| 2023 | CHN | OF | 7 | 5 | 5 | 0 | 0 | 0 |
| 2023 | CHN | P | 1 | 0 | 0 | 0 | 0 | 0 |
| 2023 | CHN | SS | 4 | 0 | 2 | 4 | 1 | 2 |
| 2024 | CHN | 2B | 10 | 6 | 12 | 17 | 0 | 3 |
| 2024 | CHN | 3B | 17 | 12 | 6 | 29 | 2 | 3 |
| 2024 | CHN | OF | 3 | 1 | 1 | 0 | 0 | 0 |
| 2024 | CHN | SS | 10 | 6 | 12 | 22 | 1 | 4 |
| 2025 | SEA | 1B | 1 | 1 | 6 | 0 | 0 | 0 |
| 2025 | SEA | 2B | 15 | 10 | 9 | 23 | 1 | 3 |
| 2025 | SEA | 3B | 27 | 18 | 12 | 27 | 0 | 1 |
| 2025 | SEA | OF | 25 | 11 | 28 | 0 | 0 | 0 |
| 2025 | SEA | P | 1 | 0 | 0 | 0 | 0 | 0 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 2 |
| First Base | 1 |
| Second Base | 38 |
| Third Base | 73 |
| Shortstop | 14 |
| Left Field | 12 |
| Right Field | 26 |
| Designated Hitter | 8 |
Miles Mastrobuoni: the record in brief
Miles Mastrobuoni's major league record starts with the debut on September 22, 2022 and remains open, because the career is ongoing. By club, Mastrobuoni's seasons break down as the Tampa Bay Rays (2022), the Chicago Cubs (2023 to 2024), and the Seattle Mariners (2025 through 2026). At 185 pounds on a 5-foot-11 frame, Mastrobuoni is listed as a third baseman. Mastrobuoni batted left-handed and threw right-handed, per the bio block. The recorded birth is October 31, 1995, in San Ramon, CA, USA. Mastrobuoni's full given name, per the bio, is Miles James Mastrobuoni.
In 208 games and 425 at bats, Mastrobuoni has batted .228 with 97 hits, adding 2 homers, 22 runs batted in, and 22 stolen bases. Mastrobuoni's career OPS of .563 combines a .293 on-base mark with .271 slugging. The league as a whole hit .245 across Mastrobuoni's seasons, which puts the .228 career mark 6.7% below average. By OPS the gap is 21.5% below league average (.563 against .718).
Frequently Asked Questions about Miles Mastrobuoni
- What years did Miles Mastrobuoni play?
- Miles Mastrobuoni played in Major League Baseball from 2022 to 2026.
- Was Miles Mastrobuoni a pitcher?
- No. Miles Mastrobuoni was a position player (Third Baseman), though he did pitch in 2 career games.
- How many home runs did Miles Mastrobuoni hit?
- Miles Mastrobuoni hit 2 career home runs with 97 hits.
- What teams has Miles Mastrobuoni played for?
- Miles Mastrobuoni has played for 3 teams: the Tampa Bay Rays (2022), the Chicago Cubs (2023–2024), and the Seattle Mariners (2025–2026).
- What are Miles Mastrobuoni's career stats?
- In 208 games, Miles Mastrobuoni has 97 hits, 2 home runs, 22 RBI, 57 runs, and 22 stolen bases, with a .228 batting average.
- What position does Miles Mastrobuoni play?
- Miles Mastrobuoni plays primarily as a third baseman, the position where he has appeared in the most games.
- How tall is Miles Mastrobuoni and how much does he weigh?
- Miles Mastrobuoni is listed at 5 feet 11 inches and 185 pounds.
- What number does Miles Mastrobuoni wear?
- Miles Mastrobuoni wears number 21, according to MLB's 2026 roster data.
- How many home runs has Miles Mastrobuoni hit each season?
- Miles Mastrobuoni's home runs by season: 0 in 2022, 1 in 2023, 0 in 2024, 1 in 2025, and 0 in 2026. His most in one season was 1, in 2023 and 2025.
- What was Miles Mastrobuoni's career batting average?
- Miles Mastrobuoni batted .228 over his career, with 97 hits in 425 at bats.
- How many RBI did Miles Mastrobuoni have?
- Miles Mastrobuoni drove in 22 runs in his career.
- What was Miles Mastrobuoni's career ERA?
- Miles Mastrobuoni finished with a 27.00 career ERA, going 0-0 with 0 strikeouts.