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Jason Jennings played 9 major-league seasons (2001-2009) as a P (225). Career totals and every year-by-year line below come from the SABR/Lahman database (CC BY-SA), covering 1871-2025.
Showing 8 season lines
| Year | Age | Team | G | AB | R | H | HR | RBI | SB | BB | SO | AVG | OPS | OPS+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | 23 | COL | 7 | 15 | 2 | 4 | 1 | 2 | 0 | 1 | 3 | .267 | .846 | 120 |
| 2002 | 24 | COL | 32 | 62 | 6 | 19 | 0 | 11 | 0 | 3 | 13 | .306 | .719 | 96 |
| 2003 | 25 | COL | 33 | 54 | 3 | 12 | 0 | 3 | 0 | 5 | 16 | .222 | .561 | 52 |
| 2004 | 26 | COL | 37 | 71 | 3 | 17 | 1 | 6 | 0 | 2 | 16 | .239 | .598 | 58 |
| 2005 | 27 | COL | 22 | 38 | 0 | 6 | 0 | 1 | 0 | 2 | 12 | .158 | .384 | 5 |
| 2006 | 28 | COL | 32 | 62 | 3 | 8 | 0 | 2 | 0 | 3 | 12 | .129 | .314 | -15 |
| 2007 | 29 | HOU | 21 | 26 | 1 | 2 | 0 | 1 | 0 | 3 | 8 | .077 | .249 | -30 |
| 2009 | 31 | TEX | 44 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | -100 |
| Year | Age | Team | G | GS | W | L | SV | IP | SO | BB | ERA | ERA+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | 23 | COL | 7 | 7 | 4 | 1 | 0 | 39.1 | 26 | 19 | 4.58 | 95 |
| 2002 | 24 | COL | 32 | 32 | 16 | 8 | 0 | 185.1 | 127 | 70 | 4.52 | 91 |
| 2003 | 25 | COL | 32 | 32 | 12 | 13 | 0 | 181.1 | 119 | 88 | 5.11 | 84 |
| 2004 | 26 | COL | 33 | 33 | 11 | 12 | 0 | 201 | 133 | 101 | 5.51 | 78 |
| 2005 | 27 | COL | 20 | 20 | 6 | 9 | 0 | 122 | 75 | 62 | 5.02 | 84 |
| 2006 | 28 | COL | 32 | 32 | 9 | 13 | 0 | 212 | 142 | 85 | 3.78 | 119 |
| 2007 | 29 | HOU | 19 | 18 | 2 | 9 | 0 | 99 | 71 | 34 | 6.45 | 69 |
| 2008 | 30 | TEX | 6 | 6 | 0 | 5 | 0 | 27.1 | 12 | 18 | 8.56 | 51 |
| 2009 | 31 | TEX | 44 | 0 | 2 | 4 | 1 | 61 | 44 | 28 | 4.13 | 108 |
| Year | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|
| 2001 | P | 7 | 7 | 4 | 7 | 0 | 3 |
| 2002 | P | 32 | 32 | 14 | 28 | 1 | 1 |
| 2003 | P | 32 | 32 | 9 | 25 | 2 | 2 |
| 2004 | P | 33 | 33 | 18 | 25 | 1 | 2 |
| 2005 | P | 20 | 20 | 14 | 17 | 2 | 2 |
| 2006 | P | 32 | 32 | 14 | 25 | 1 | 3 |
| 2007 | P | 19 | 18 | 6 | 5 | 0 | 0 |
| 2008 | P | 6 | 6 | 4 | 3 | 1 | 0 |
| 2009 | P | 44 | 0 | 1 | 6 | 1 | 0 |
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.
Jason Jennings won: Rookie of the Year 2002 (NL).
MVP, Cy Young and Rookie of the Year voting history (1 ballot finishes, 1 win). Full year pages: 2002.
| Year | Award | Lg | Rank | Points | First-place votes |
|---|---|---|---|---|---|
| 2002 | Rookie of the Year (winner) | NL | 1 | 150 / 160 | 27 |
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.