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J. A. Happ played 15 major-league seasons (2007-2021) as a P (354). Career totals and every year-by-year line below come from the SABR/Lahman database (CC BY-SA), covering 1871-2025.
Showing 14 season lines
| Year | Age | Team | G | AB | R | H | HR | RBI | SB | BB | SO | AVG | OPS | OPS+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 25 | PHI | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | -100 |
| 2008 | 26 | PHI | 8 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | .000 | .000 | -100 |
| 2009 | 27 | PHI | 35 | 43 | 2 | 4 | 0 | 1 | 0 | 1 | 15 | .093 | .230 | -37 |
| 2010 | 28 | PHI|HOU | 16 | 26 | 0 | 0 | 0 | 0 | 0 | 1 | 9 | .000 | .037 | -89 |
| 2011 | 29 | HOU | 29 | 43 | 3 | 7 | 1 | 4 | 0 | 3 | 17 | .163 | .473 | 34 |
| 2012 | 30 | HOU | 22 | 32 | 2 | 3 | 0 | 1 | 0 | 3 | 16 | .094 | .265 | -23 |
| 2014 | 32 | TOR | 30 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | .000 | .000 | -100 |
| 2015 | 33 | SEA | 21 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | .000 | .500 | 57 |
| 2015 | 33 | PIT | 11 | 22 | 1 | 2 | 0 | 0 | 0 | 0 | 13 | .091 | .182 | -48 |
| 2016 | 34 | TOR | 32 | 7 | 2 | 2 | 0 | 0 | 0 | 0 | 3 | .286 | .571 | 57 |
| 2017 | 35 | TOR | 25 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | -100 |
| 2018 | 36 | TOR|NYA | 31 | 6 | 2 | 2 | 0 | 0 | 0 | 1 | 3 | .333 | .762 | 115 |
| 2019 | 37 | NYA | 32 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | -100 |
| 2021 | 39 | SLN | 11 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 5 | .000 | .067 | -79 |
| Year | Age | Team | G | GS | W | L | SV | IP | SO | BB | ERA | ERA+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 25 | PHI | 1 | 1 | 0 | 1 | 0 | 4 | 5 | 2 | 11.25 | 39 |
| 2008 | 26 | PHI | 8 | 4 | 1 | 0 | 0 | 31.2 | 26 | 14 | 3.69 | 116 |
| 2009 | 27 | PHI | 35 | 23 | 12 | 4 | 0 | 166 | 119 | 56 | 2.93 | 143 |
| 2010 | 28 | PHI|HOU | 16 | 16 | 6 | 4 | 0 | 87.1 | 70 | 47 | 3.40 | 118 |
| 2011 | 29 | HOU | 28 | 28 | 6 | 15 | 0 | 156.1 | 134 | 83 | 5.35 | 71 |
| 2012 | 30 | TOR | 10 | 6 | 3 | 2 | 0 | 40.1 | 46 | 17 | 4.69 | 87 |
| 2012 | 30 | HOU | 18 | 18 | 7 | 9 | 0 | 104.1 | 98 | 39 | 4.83 | 82 |
| 2013 | 31 | TOR | 18 | 18 | 5 | 7 | 0 | 92.2 | 77 | 45 | 4.56 | 87 |
| 2014 | 32 | TOR | 30 | 26 | 11 | 11 | 0 | 158 | 133 | 51 | 4.22 | 90 |
| 2015 | 33 | SEA | 21 | 20 | 4 | 6 | 0 | 108.2 | 82 | 32 | 4.64 | 86 |
| 2015 | 33 | PIT | 11 | 11 | 7 | 2 | 0 | 63.1 | 69 | 13 | 1.85 | 211 |
| 2016 | 34 | TOR | 32 | 32 | 20 | 4 | 0 | 195 | 163 | 60 | 3.18 | 132 |
| 2017 | 35 | TOR | 25 | 25 | 10 | 11 | 0 | 145.1 | 142 | 46 | 3.53 | 124 |
| 2018 | 36 | TOR|NYA | 31 | 31 | 17 | 6 | 0 | 177.2 | 193 | 51 | 3.65 | 117 |
| 2019 | 37 | NYA | 31 | 30 | 12 | 8 | 0 | 161.1 | 140 | 49 | 4.91 | 94 |
| 2020 | 38 | NYA | 9 | 9 | 2 | 2 | 0 | 49.1 | 42 | 15 | 3.47 | 128 |
| 2021 | 39 | MIN | 19 | 19 | 5 | 6 | 0 | 98.1 | 77 | 31 | 6.77 | 64 |
| 2021 | 39 | SLN | 11 | 11 | 5 | 2 | 0 | 54 | 45 | 17 | 4.00 | 105 |
| Year | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|
| 2007 | P | 1 | 1 | 0 | 0 | 0 | 0 |
| 2008 | P | 8 | 4 | 1 | 4 | 0 | 0 |
| 2009 | P | 35 | 23 | 6 | 20 | 0 | 0 |
| 2010 | P | 16 | 16 | 4 | 9 | 0 | 0 |
| 2011 | P | 28 | 28 | 4 | 13 | 0 | 0 |
| 2012 | P | 28 | 24 | 8 | 21 | 0 | 0 |
| 2013 | P | 18 | 18 | 2 | 9 | 0 | 0 |
| 2014 | P | 30 | 26 | 0 | 19 | 1 | 0 |
| 2015 | P | 32 | 31 | 4 | 21 | 2 | 0 |
| 2016 | P | 32 | 32 | 6 | 26 | 0 | 0 |
| 2017 | P | 25 | 25 | 4 | 16 | 2 | 0 |
| 2018 | P | 31 | 31 | 4 | 9 | 1 | 2 |
| 2019 | P | 31 | 30 | 2 | 12 | 1 | 0 |
| 2020 | P | 9 | 9 | 2 | 5 | 0 | 0 |
| 2021 | P | 30 | 30 | 5 | 8 | 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.
MVP, Cy Young and Rookie of the Year voting history (2 ballot finishes, 0 wins). Full year pages: 2016, 2009.
| Year | Award | Lg | Rank | Points | First-place votes |
|---|---|---|---|---|---|
| 2009 | Rookie of the Year | NL | 2 | 94 / 160 | 10 |
| 2016 | Cy Young Award | AL | 6 | 14 / 210 | 0 |
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.