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Don Mossi played 12 major-league seasons (1954-1965) as a P (460). Career totals and every year-by-year line below come from the SABR/Lahman database (CC BY-SA), covering 1871-2025.
Showing 12 season lines
| Year | Age | Team | G | AB | R | H | HR | RBI | SB | BB | SO | AVG | OPS | OPS+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 25 | CLE | 40 | 19 | 1 | 3 | 0 | 0 | 0 | 3 | 10 | .158 | .431 | 24 |
| 1955 | 26 | CLE | 57 | 9 | 0 | 1 | 0 | 0 | 0 | 2 | 4 | .111 | .384 | 10 |
| 1956 | 27 | CLE | 48 | 20 | 1 | 3 | 0 | 2 | 0 | 2 | 10 | .150 | .477 | 30 |
| 1957 | 28 | CLE | 36 | 55 | 4 | 12 | 0 | 1 | 0 | 4 | 12 | .218 | .521 | 48 |
| 1958 | 29 | CLE | 43 | 26 | 3 | 3 | 0 | 1 | 0 | 0 | 13 | .115 | .226 | -36 |
| 1959 | 30 | DET | 36 | 77 | 6 | 13 | 1 | 8 | 0 | 3 | 28 | .169 | .457 | 28 |
| 1960 | 31 | DET | 23 | 43 | 0 | 5 | 0 | 2 | 0 | 7 | 12 | .116 | .371 | 7 |
| 1961 | 32 | DET | 35 | 79 | 8 | 13 | 1 | 8 | 0 | 6 | 28 | .165 | .451 | 25 |
| 1962 | 33 | DET | 36 | 55 | 5 | 9 | 0 | 3 | 0 | 10 | 20 | .164 | .456 | 31 |
| 1963 | 34 | DET | 24 | 39 | 2 | 8 | 0 | 4 | 0 | 6 | 12 | .205 | .568 | 66 |
| 1964 | 35 | CHA | 34 | 6 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | .167 | .333 | -4 |
| 1965 | 36 | KC1 | 51 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | -100 |
| Year | Age | Team | G | GS | W | L | SV | IP | SO | BB | ERA | ERA+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 25 | CLE | 40 | 5 | 6 | 1 | 7 | 93 | 55 | 39 | 1.94 | 192 |
| 1955 | 26 | CLE | 57 | 1 | 4 | 3 | 9 | 81.2 | 69 | 18 | 2.42 | 163 |
| 1956 | 27 | CLE | 48 | 3 | 6 | 5 | 11 | 87.2 | 59 | 33 | 3.59 | 116 |
| 1957 | 28 | CLE | 36 | 22 | 11 | 10 | 2 | 159 | 97 | 57 | 4.13 | 92 |
| 1958 | 29 | CLE | 43 | 5 | 7 | 8 | 3 | 101.2 | 55 | 30 | 3.90 | 97 |
| 1959 | 30 | DET | 34 | 30 | 17 | 9 | 0 | 228 | 125 | 49 | 3.36 | 115 |
| 1960 | 31 | DET | 23 | 22 | 9 | 8 | 0 | 158.1 | 69 | 32 | 3.47 | 112 |
| 1961 | 32 | DET | 35 | 34 | 15 | 7 | 1 | 240.1 | 137 | 47 | 2.96 | 136 |
| 1962 | 33 | DET | 35 | 27 | 11 | 13 | 1 | 180.1 | 121 | 36 | 4.19 | 95 |
| 1963 | 34 | DET | 24 | 16 | 7 | 7 | 2 | 122.2 | 68 | 17 | 3.74 | 97 |
| 1964 | 35 | CHA | 34 | 0 | 3 | 1 | 7 | 40 | 36 | 7 | 2.93 | 124 |
| 1965 | 36 | KC1 | 51 | 0 | 5 | 8 | 7 | 55.1 | 41 | 20 | 3.74 | 92 |
| Year | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|
| 1954 | P | 40 | 5 | 4 | 11 | 0 | 1 |
| 1955 | P | 57 | 1 | 7 | 19 | 0 | 2 |
| 1956 | P | 48 | 3 | 3 | 15 | 1 | 1 |
| 1957 | P | 36 | 22 | 7 | 21 | 0 | 2 |
| 1958 | P | 43 | 5 | 8 | 17 | 0 | 1 |
| 1959 | P | 34 | 30 | 12 | 38 | 1 | 5 |
| 1960 | P | 23 | 22 | 2 | 27 | 0 | 2 |
| 1961 | P | 35 | 34 | 7 | 40 | 1 | 8 |
| 1962 | P | 35 | 27 | 9 | 19 | 0 | 3 |
| 1963 | P | 24 | 16 | 6 | 20 | 0 | 1 |
| 1964 | P | 34 | 0 | 2 | 5 | 0 | 0 |
| 1965 | P | 51 | 0 | 2 | 7 | 0 | 2 |
Team codes are the source codes (e.g. NYN for the New York Mets, BS1 for the 1875 Boston club). OPS+ is league-season normalized, not park-adjusted; unrecorded source values (such as RBI in the earliest recorded seasons) are absent, never zero-filled.
MVP, Cy Young and Rookie of the Year voting history (1 ballot finishes, 0 wins). Full year pages: 1955.
| Year | Award | Lg | Rank | Points | First-place votes |
|---|---|---|---|---|---|
| 1955 | Most Valuable Player | AL | 25 | 1 / 336 | 0 |
Don Mossi ranks on 1 all-time single-season position leaderboard (1871-2025, league-season-normalized OPS+ / ERA+).
| Rank | Board | Year | Stat |
|---|---|---|---|
| #126 | relief pitchers | 1954 | 192 ERA+ |
Every career total and season line is computed from the SABR / Sean Lahman baseball database (2025 edition, CC BY-SA 3.0), the same source behind our historical position leaderboards. Rate stats use league-season normalization only (OPS+ and ERA+ as marked, never park-adjusted); unrecorded early-era values stay absent rather than being invented. Career totals sum only what the source records.
Award winners and MVP / Cy Young / Rookie of the Year voting history come from the same database; the year pages live under MLB award voting history. Official transactions (2011 to the current season) come from the MLB StatsAPI feed on our transactions archive.