Jack Aker
Kansas City Athletics 1964–1967; Oakland Athletics 1968; New York Yankees 1969; Seattle Pilots 1969; New York Yankees 1970–1971; Chicago Cubs 1972; New York Yankees 1972; Chicago Cubs 1973; Atlanta Braves 1974; New York Mets 1974
Percentile snapshot
No qualified season. This player never reached the qualification floor — 3.1 plate appearances, or one inning, per game his team played — in any archived season, so there is no season population to rank him inside.
Career, era-adjusted
sWAR measured against every career in history, 24,011 of them. Only era-adjusted career stats carry a percentile — a raw career total gets a rank instead, because pooling the 1890s with the 2020s is a choice, not a measurement.
Season by season
Batting
| Season | G | PA | AB | R | H | 2B | 3B | HR | RBI | BB | SO | SB | CS | BA | OBP | SLG | OPS | wRC+ | OPS+ | wOBA | sWAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1964 | 10 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | .000 | .000 | .000 | .000 | -136.4 | -100.0 | .000 | -0.9 |
| 1965 | 34 | 9 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 0 | .000 | .000 | .000 | .000 | -129.6 | -100.0 | .000 | 0.6 |
| 1966 | 66 | 22 | 21 | 1 | 2 | 1 | 0 | 0 | 2 | 0 | 12 | 0 | 0 | .095 | .095 | .143 | .238 | -50.7 | -32.0 | .106 | 3.0 |
| 1967 | 57 | 11 | 8 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 4 | 0 | 0 | .125 | .125 | .125 | .250 | -43.7 | -25.0 | .116 | -0.5 |
| 1968 | 54 | 8 | 7 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | .143 | .143 | .143 | .286 | -33.2 | -11.8 | .133 | -0.5 |
| 1969 | 53 | 11 | 10 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | .100 | .182 | .100 | .282 | -20.1 | -20.2 | .153 | 1.1 |
| 1970 | 41 | 17 | 16 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 6 | 0 | 0 | .063 | .063 | .063 | .125 | -85.5 | -64.4 | .058 | 1.8 |
| 1971 | 41 | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | .000 | .000 | .000 | .000 | -134.8 | -100.0 | .000 | 1.1 |
| 1972 | 52 | 7 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 0 | 0 | .000 | .143 | .000 | .143 | -64.3 | -57.7 | .107 | 1.3 |
| 1973 | 47 | 7 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | .000 | .000 | .000 | .000 | -132.5 | -100.0 | .000 | 0.4 |
| 1974 | 41 | 3 | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .333 | .333 | .667 | 1.000 | 177.7 | 178.4 | .449 | 0.7 |
Pitching
| Season | G | GS | W | L | SV | CG | SHO | H | ER | BB | SO | HR | IP | ERA | WHIP | K/9 | FIP | FIP- | ERA+ | sWAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1964 | 9 | 0 | 0 | 1 | 0 | 0 | 0 | 17 | 16 | 10 | 7 | 6 | 16.3 | 8.82 | 1.653 | 3.86 | 9.32 | 246.1 | 42.9 | -0.9 |
| 1965 | 34 | 0 | 4 | 3 | 3 | 0 | 0 | 45 | 18 | 18 | 26 | 3 | 51.3 | 3.16 | 1.227 | 4.56 | 3.37 | 96.8 | 110.4 | 0.6 |
| 1966 | 66 | 0 | 8 | 4 | 32 | 0 | 0 | 81 | 25 | 28 | 68 | 7 | 113.0 | 1.99 | .965 | 5.42 | 2.86 | 84.4 | 170.2 | 3.0 |
| 1967 | 57 | 0 | 3 | 8 | 12 | 0 | 0 | 87 | 42 | 32 | 65 | 9 | 88.0 | 4.30 | 1.352 | 6.65 | 3.46 | 109.2 | 73.8 | -0.5 |
| 1968 | 54 | 0 | 4 | 4 | 11 | 0 | 0 | 72 | 34 | 33 | 44 | 6 | 74.7 | 4.10 | 1.406 | 5.30 | 3.66 | 126.1 | 70.8 | -0.5 |
| 1969 | 53 | 0 | 8 | 6 | 14 | 0 | 0 | 76 | 29 | 35 | 47 | 8 | 82.3 | 3.17 | 1.348 | 5.14 | 3.94 | 111.7 | 110.5 | 1.1 |
| 1970 | 41 | 0 | 4 | 2 | 16 | 0 | 0 | 57 | 16 | 20 | 36 | 3 | 70.0 | 2.06 | 1.100 | 4.63 | 2.99 | 84.3 | 172.1 | 1.8 |
| 1971 | 41 | 0 | 4 | 4 | 4 | 0 | 0 | 48 | 16 | 26 | 24 | 3 | 55.7 | 2.59 | 1.329 | 3.88 | 3.60 | 104.6 | 132.9 | 1.1 |
| 1972 | 52 | 0 | 6 | 6 | 17 | 0 | 0 | 70 | 24 | 26 | 37 | 4 | 73.0 | 2.96 | 1.315 | 4.56 | 3.52 | 96.2 | 124.4 | 1.3 |
| 1973 | 47 | 0 | 4 | 5 | 12 | 0 | 0 | 76 | 29 | 23 | 25 | 8 | 63.7 | 4.10 | 1.555 | 3.53 | 4.58 | 117.7 | 94.9 | 0.4 |
| 1974 | 41 | 0 | 2 | 2 | 2 | 0 | 0 | 50 | 23 | 23 | 25 | 7 | 58.0 | 3.57 | 1.259 | 3.88 | 4.59 | 126.4 | 101.3 | 0.7 |
sWAR is the season TOTAL for a player who both hit and pitched: the record book carries one figure per season, not a split, so the same number appears on both lines rather than being counted twice.
Career totals
Batting
Pitching
A total is called out only where it ranks in the all-time top 500; hover a figure for its rank and the size of the field it was ranked in. Ranks are absolute facts and carry no percentile — the population for "career home runs" would be an editorial choice, and the rank is not.
Best games
Batting
| Date | Game | AB | R | H | 2B | 3B | HR | RBI | BB | TB |
|---|---|---|---|---|---|---|---|---|---|---|
| 1966-07-10 | CLE @ ATH Gameday | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 2 |
| 1974-07-12 | NYM @ LAD Gameday | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
| 1966-09-10 | DET @ ATH Gameday | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
| 1967-04-23 | ATH @ BAL Gameday | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
| 1970-04-19 | NYY @ BAL Gameday | 2 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
Pitching
| Date | Game | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|
| 1967-04-29 | ATH @ BOS Gameday | 8.1 | 7 | 2 | 2 | 2 | 8 | 0 |
| 1965-09-03 | ATH @ LAA Gameday | 3.0 | 1 | 0 | 0 | 1 | 5 | 0 |
| 1966-09-07 | LAA @ ATH Gameday | 3.2 | 1 | 0 | 0 | 1 | 4 | 0 |
| 1967-05-30 | ATH @ TEX Gameday | 3.1 | 2 | 2 | 2 | 2 | 4 | 2 |
| 1967-06-17 | ATH @ DET Gameday | 3.0 | 0 | 0 | 0 | 2 | 4 | 0 |
Ranked from our own play-by-play game log, which begins in 1901 — not from the record book, so a career played outside it shows nothing here rather than a short list.