Jerry Koosman was born on Wednesday, December 23, 1942, in Appleton, Minnesota. Koosman was 24 years old when he broke into the big leagues on April 14, 1967, with the New York Mets. His biographical data, year-by-year hitting stats, fielding stats, pitching stats (where applicable), career totals, uniform numbers, salary data and miscellaneous items-of-interest are presented by Baseball Almanac on this comprehensive Jerry Koosman baseball stats page.
"Jerry Koosman: The winningest left-handed pitcher in Mets history... Won two games during the 1969 World Series including a complete game in the decisive Game Five... Won 19 games including seven shutouts as a rookie... Among the club's leaders in wins (140); starts (346), complete games (108) and shutouts (26)... Mets scouts discovered the two-time All-Star while he was pitching for the U.S. Army. He is the fifth Met to have his number retired (2021)." - New York Mets Hall of Fame. Class of 1989. New York Mets Hall of Fame Plaque.
Jerry Koosman![]() Jerry Koosman Autograph on a 1981 Fleer Baseball Card (#552) |
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Jerry KoosmanJerry Koosman Pitching Stats |
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| Year | Age | Team | G | GS | GF | W | L | PCT | ERA | CG | SHO | SV | IP | BFP | H | ER | R | HR | BB | IBB | SO | WP | HB | BK | HLD |
| 1967 | 25 | Mets | 9 | 3 | 1 | 0 | 2 | .000 | 6.04 | 0 | 0 | 0 | 22.1 | 105 | 22 | 15 | 17 | 3 | 19 | 4 | 11 | 0 | 0 | 1 | - |
| 1968 | 26 | Mets | 35 | 34 | 0 | 19 | 12 | .613 | 2.08 | 17 | 7 | 0 | 263.2 | 1,058 | 221 | 61 | 72 | 16 | 69 | 7 | 178 | 8 | 8 | 0 | - |
| 1969 | 27 | Mets | 32 | 32 | 0 | 17 | 9 | .654 | 2.28 | 16 | 6 | 0 | 241.0 | 957 | 187 | 61 | 66 | 14 | 68 | 11 | 180 | 7 | 4 | 2 | 0 |
| 1970 | 28 | Mets | 30 | 29 | 0 | 12 | 7 | .632 | 3.14 | 5 | 1 | 0 | 212.0 | 884 | 189 | 74 | 87 | 22 | 71 | 14 | 118 | 7 | 2 | 3 | - |
| 1971 | 29 | Mets | 26 | 24 | 0 | 6 | 11 | .353 | 3.04 | 4 | 0 | 0 | 165.2 | 694 | 160 | 56 | 66 | 12 | 51 | 4 | 96 | 7 | 1 | 0 | - |
| 1972 | 30 | Mets | 34 | 24 | 5 | 11 | 12 | .478 | 4.14 | 4 | 1 | 1 | 163.0 | 692 | 155 | 75 | 81 | 14 | 52 | 7 | 147 | 9 | 6 | 0 | - |
| 1973 | 31 | Mets | 35 | 35 | 0 | 14 | 15 | .483 | 2.84 | 12 | 3 | 0 | 263.0 | 1,071 | 234 | 83 | 93 | 18 | 76 | 6 | 156 | 3 | 4 | 0 | 0 |
| 1974 | 32 | Mets | 35 | 35 | 0 | 15 | 11 | .577 | 3.36 | 13 | 0 | 0 | 265.0 | 1,118 | 258 | 99 | 113 | 16 | 85 | 7 | 188 | 8 | 7 | 1 | 0 |
| 1975 | 33 | Mets | 36 | 34 | 2 | 14 | 13 | .519 | 3.42 | 11 | 4 | 2 | 239.2 | 1,018 | 234 | 91 | 106 | 19 | 98 | 6 | 173 | 7 | 4 | 7 | - |
| 1976 | 34 | Mets | 34 | 32 | 0 | 21 | 10 | .677 | 2.69 | 17 | 3 | 0 | 247.1 | 994 | 205 | 74 | 81 | 19 | 66 | 7 | 200 | 3 | 1 | 1 | - |
| 1977 | 35 | Mets | 32 | 32 | 0 | 8 | 20 | .286 | 3.49 | 6 | 1 | 0 | 226.2 | 940 | 195 | 88 | 102 | 17 | 81 | 8 | 192 | 2 | 4 | 4 | 0 |
| 1978 | 36 | Mets | 38 | 32 | 6 | 3 | 15 | .167 | 3.75 | 3 | 0 | 2 | 235.1 | 986 | 221 | 98 | 110 | 17 | 84 | 11 | 160 | 5 | 8 | 1 | - |
| 1979 | 37 | Twins | 37 | 36 | 0 | 20 | 13 | .606 | 3.38 | 10 | 2 | 0 | 263.2 | 1,101 | 268 | 99 | 108 | 19 | 83 | 4 | 157 | 2 | 3 | 1 | - |
| 1980 | 38 | Twins | 38 | 34 | 2 | 16 | 13 | .552 | 4.03 | 8 | 0 | 2 | 243.1 | 1,022 | 252 | 109 | 119 | 24 | 69 | 5 | 149 | 2 | 5 | 1 | - |
| 1981 | 39 | Twins | 19 | 13 | 5 | 3 | 9 | .250 | 4.20 | 2 | 1 | 5 | 94.1 | 404 | 98 | 44 | 49 | 8 | 34 | 7 | 55 | 1 | 0 | 1 | - |
| 1981 | 39 | White Sox | 8 | 3 | 4 | 1 | 4 | .200 | 3.33 | 1 | 0 | 0 | 27.0 | 113 | 27 | 10 | 10 | 2 | 7 | 0 | 21 | 1 | 0 | 0 | - |
| 1982 | 40 | White Sox | 42 | 19 | 12 | 11 | 7 | .611 | 3.84 | 3 | 1 | 3 | 173.1 | 726 | 194 | 74 | 81 | 9 | 38 | 3 | 88 | 4 | 2 | 2 | - |
| 1983 | 41 | White Sox | 37 | 24 | 6 | 11 | 7 | .611 | 4.77 | 2 | 1 | 2 | 169.2 | 730 | 176 | 90 | 96 | 19 | 53 | 2 | 90 | 5 | 6 | 0 | - |
| 1984 | 42 | Phillies | 36 | 34 | 0 | 14 | 15 | .483 | 3.25 | 3 | 1 | 0 | 224.0 | 950 | 232 | 81 | 95 | 8 | 60 | 5 | 137 | 6 | 3 | 2 | - |
| 1985 | 43 | Phillies | 19 | 18 | 0 | 6 | 4 | .600 | 4.62 | 3 | 1 | 0 | 99.1 | 433 | 107 | 51 | 56 | 14 | 34 | 3 | 60 | 2 | 3 | 2 | - |
| Career | G | GS | GF | W | L | PCT | ERA | CG | SHO | SV | IP | BFP | H | ER | R | HR | BB | IBB | SO | WP | HB | BK | HLD | ||
| 19 Years | 612 | 527 | 43 | 222 | 209 | .515 | 3.36 | 140 | 33 | 17 | 3,839.1 | 15,996 | 3,635 | 1,433 | 1,608 | 290 | 1,198 | 121 | 2,556 | 89 | 71 | 29 | 0 | ||
Jerry KoosmanJerry Koosman Hitting Stats |
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| Year | Age | Team | G | AB | R | H | 2B | 3B | HR | GRSL | RBI | BB | IBB | SO | SH | SF | HBP | GIDP | AVG | OBP | SLG |
| 1967 | 25 | Mets | 9 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | .000 | .333 | .000 |
| 1968 | 26 | Mets | 35 | 91 | 3 | 7 | 1 | 0 | 1 | 0 | 4 | 3 | 0 | 62 | 3 | 0 | 0 | 1 | .077 | .106 | .121 |
| 1969 | 27 | Mets | 32 | 84 | 1 | 4 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 46 | 4 | 0 | 0 | 2 | .048 | .059 | .048 |
| 1970 | 28 | Mets | 30 | 70 | 5 | 6 | 1 | 0 | 0 | 0 | 4 | 8 | 0 | 46 | 8 | 0 | 0 | 2 | .086 | .179 | .100 |
| 1971 | 29 | Mets | 26 | 50 | 3 | 8 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 25 | 6 | 0 | 1 | 1 | .160 | .222 | .160 |
| 1972 | 30 | Mets | 34 | 47 | 1 | 4 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 18 | 9 | 0 | 0 | 1 | .085 | .085 | .085 |
| 1973 | 31 | Mets | 35 | 78 | 3 | 8 | 1 | 0 | 0 | 0 | 3 | 2 | 0 | 37 | 15 | 0 | 0 | 2 | .103 | .125 | .115 |
| 1974 | 32 | Mets | 35 | 86 | 5 | 16 | 2 | 1 | 0 | 0 | 5 | 7 | 0 | 29 | 10 | 0 | 0 | 2 | .186 | .247 | .233 |
| 1975 | 33 | Mets | 36 | 78 | 4 | 14 | 2 | 0 | 0 | 0 | 6 | 4 | 0 | 31 | 7 | 0 | 0 | 0 | .179 | .220 | .205 |
| 1976 | 34 | Mets | 34 | 79 | 5 | 17 | 2 | 0 | 0 | 0 | 6 | 2 | 0 | 34 | 13 | 0 | 0 | 1 | .215 | .235 | .241 |
| 1977 | 35 | Mets | 32 | 72 | 2 | 8 | 0 | 0 | 1 | 0 | 7 | 0 | 0 | 30 | 5 | 1 | 1 | 2 | .111 | .122 | .153 |
| 1978 | 36 | Mets | 38 | 70 | 1 | 6 | 3 | 0 | 0 | 0 | 2 | 0 | 0 | 27 | 5 | 0 | 0 | 0 | .086 | .086 | .129 |
| 1979 | 37 | Twins | 37 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| 1980 | 38 | Twins | 38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| 1981 | 39 | Twins | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| 1981 | 39 | White Sox | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| 1982 | 40 | White Sox | 42 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| 1983 | 41 | White Sox | 37 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 |
| 1984 | 42 | Phillies | 36 | 74 | 2 | 8 | 0 | 0 | 0 | 0 | 3 | 1 | 0 | 23 | 14 | 0 | 0 | 3 | .108 | .120 | .108 |
| 1985 | 43 | Phillies | 19 | 34 | 1 | 3 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 9 | 1 | 1 | 0 | 2 | .088 | .111 | .088 |
| Career | G | AB | R | H | 2B | 3B | HR | GRSL | RBI | BB | IBB | SO | SH | SF | HBP | GIDP | AVG | OBP | SLG | ||
| 19 Years | 612 | 915 | 36 | 109 | 12 | 1 | 2 | 0 | 46 | 33 | 0 | 418 | 100 | 2 | 2 | 19 | .119 | .151 | .141 | ||
Jerry KoosmanJerry Koosman Fielding Stats |
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| Team | POS | G | GS | OUTS | TC | TC/G | CH | PO | A | E | DP | PB | CASB | CACS | FLD% | RF |
| 1967 Mets | P | 9 | 3 | 67 | 5 | 0.6 | 5 | 0 | 5 | 0 | 1 | n/a | n/a | n/a | 1.000 | 2.01 |
| 1968 Mets | P | 35 | 34 | 791 | 47 | 1.3 | 47 | 5 | 42 | 0 | 2 | n/a | n/a | n/a | 1.000 | 1.60 |
| 1969 Mets | P | 32 | 32 | 723 | 42 | 1.3 | 41 | 4 | 37 | 1 | 3 | n/a | n/a | n/a | .976 | 1.53 |
| 1970 Mets | P | 30 | 29 | 636 | 27 | 0.9 | 27 | 7 | 20 | 0 | 1 | n/a | n/a | n/a | 1.000 | 1.15 |
| 1971 Mets | P | 26 | 24 | 497 | 30 | 1.2 | 29 | 6 | 23 | 1 | 2 | n/a | n/a | n/a | .967 | 1.58 |
| 1972 Mets | P | 34 | 24 | 489 | 28 | 0.8 | 27 | 4 | 23 | 1 | 1 | n/a | n/a | n/a | .964 | 1.49 |
| 1973 Mets | P | 35 | 35 | 789 | 48 | 1.4 | 46 | 5 | 41 | 2 | 1 | n/a | n/a | n/a | .958 | 1.57 |
| 1974 Mets | P | 35 | 35 | 795 | 53 | 1.5 | 49 | 8 | 41 | 4 | 2 | n/a | n/a | n/a | .925 | 1.66 |
| 1975 Mets | P | 36 | 34 | 719 | 45 | 1.3 | 42 | 10 | 32 | 3 | 3 | n/a | n/a | n/a | .933 | 1.58 |
| 1976 Mets | P | 34 | 32 | 742 | 47 | 1.4 | 44 | 5 | 39 | 3 | 1 | n/a | n/a | n/a | .936 | 1.60 |
| 1977 Mets | P | 32 | 32 | 680 | 33 | 1.0 | 29 | 4 | 25 | 4 | 0 | n/a | n/a | n/a | .879 | 1.15 |
| 1978 Mets | P | 38 | 32 | 706 | 58 | 1.5 | 52 | 4 | 48 | 6 | 4 | n/a | n/a | n/a | .897 | 1.99 |
| 1979 Twins | P | 37 | 36 | 791 | 65 | 1.8 | 60 | 10 | 50 | 5 | 6 | n/a | n/a | n/a | .923 | 2.05 |
| 1980 Twins | P | 38 | 34 | 730 | 51 | 1.3 | 48 | 7 | 41 | 3 | 2 | n/a | n/a | n/a | .941 | 1.78 |
| 1981 Twins | P | 19 | 13 | 283 | 21 | 1.1 | 20 | 5 | 15 | 1 | 0 | n/a | n/a | n/a | .952 | 1.91 |
| 1981 White Sox | P | 8 | 3 | 81 | 4 | 0.5 | 4 | 2 | 2 | 0 | 0 | n/a | n/a | n/a | 1.000 | 1.33 |
| 1982 White Sox | P | 42 | 19 | 520 | 37 | 0.9 | 36 | 12 | 24 | 1 | 3 | n/a | n/a | n/a | .973 | 1.87 |
| 1983 White Sox | P | 37 | 24 | 509 | 33 | 0.9 | 31 | 5 | 26 | 2 | 2 | n/a | n/a | n/a | .939 | 1.64 |
| 1984 Phillies | P | 36 | 34 | 672 | 47 | 1.3 | 43 | 9 | 34 | 4 | 1 | n/a | n/a | n/a | .915 | 1.73 |
| 1985 Phillies | P | 19 | 18 | 298 | 19 | 1.0 | 18 | 4 | 14 | 1 | 1 | n/a | n/a | n/a | .947 | 1.63 |
| Career | POS | G | GS | OUTS | TC | TC/G | CH | PO | A | E | DP | PB | CASB | CACS | FLD% | RF |
| P Totals | 612 | 527 | 11,518 | 740 | 1.2 | 698 | 116 | 582 | 42 | 36 | n/a | n/a | n/a | .943 | 1.64 | |
| 19 Years | 612 | 527 | 11,518 | 740 | 1.2 | 698 | 116 | 582 | 42 | 36 | n/a | n/a | n/a | .943 | 1.64 | |
Jerry KoosmanJerry Koosman Miscellaneous Stats |
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| Baserunning Statistics | Other Positions | Common Hitting Ratios | Common Pitching Ratios | |||||||||
| Team | SB | CS | SB% | PH | PR | DH | AB/HR | AB/K | AB/RBI | K/BB | K/9 | BB/9 |
| 1967 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 2.0 | 0.0 | 0.58 | 4.43 | 7.66 |
| 1968 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 91.0 | 1.5 | 22.8 | 2.58 | 6.08 | 2.36 |
| 1969 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 1.8 | 84.0 | 2.65 | 6.72 | 2.54 |
| 1970 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 1.5 | 17.5 | 1.66 | 5.01 | 3.01 |
| 1971 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 2.0 | 0.0 | 1.88 | 5.22 | 2.77 |
| 1972 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 2.6 | 47.0 | 2.83 | 8.12 | 2.87 |
| 1973 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 2.1 | 26.0 | 2.05 | 5.34 | 2.60 |
| 1974 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 3.0 | 17.2 | 2.21 | 6.38 | 2.89 |
| 1975 Mets | 1 | 0 | 1.000 | 0 | 0 | n/a | 0.0 | 2.5 | 13.0 | 1.77 | 6.50 | 3.68 |
| 1976 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 2.3 | 13.2 | 3.03 | 7.28 | 2.40 |
| 1977 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 72.0 | 2.4 | 10.3 | 2.37 | 7.62 | 3.22 |
| 1978 Mets | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 2.6 | 35.0 | 1.90 | 6.12 | 3.21 |
| 1979 Twins | 0 | 0 | .000 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1.89 | 5.36 | 2.83 |
| 1980 Twins | 0 | 0 | .000 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 2.16 | 5.51 | 2.55 |
| 1981 Twins | 0 | 0 | .000 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1.62 | 5.25 | 3.24 |
| 1981 White Sox | 0 | 0 | .000 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 3.00 | 7.00 | 2.33 |
| 1982 White Sox | 0 | 0 | .000 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 2.32 | 4.57 | 1.97 |
| 1983 White Sox | 0 | 0 | .000 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1.70 | 4.77 | 2.81 |
| 1984 Phillies | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 3.2 | 24.7 | 2.28 | 5.50 | 2.41 |
| 1985 Phillies | 0 | 0 | .000 | 0 | 0 | n/a | 0.0 | 3.8 | 8.5 | 1.76 | 5.44 | 3.08 |
| Career | SB | CS | SB% | PH | PR | DH | AB/HR | AB/K | AB/RBI | K/BB | K/9 | BB/9 |
| 19 Years | 1 | 0 | 1.000 | 0 | 0 | 0 | 457.5 | 2.2 | 19.9 | 2.13 | 5.99 | 2.81 |
Jerry KoosmanJerry Koosman Miscellaneous Items of Interest |
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| Team | Roster | Uniform Numbers | Salary | All-Star | World Series |
| 1967 New York Mets | 36 | $6,000.00 | - | - |
| 1968 New York Mets | 36 | $12,000.00 | Stats | - |
| 1969 New York Mets | 36 | $30,000.00 | Stats | Stats |
| 1970 New York Mets | 36 | $50,000.00 | - | - |
| 1971 New York Mets | 36 | $50,000.00 | - | - |
| 1972 New York Mets | 36 | $65,000.00 | - | - |
| 1973 New York Mets | 36 | $75,000.00 | - | Stats |
| 1974 New York Mets | 36 | $75,000.00 | - | - |
| 1975 New York Mets | 36 | $100,000.00 | - | - |
| 1976 New York Mets | 36 | $100,000.00 | - | - |
| 1977 New York Mets | 36 | $150,000.00 | - | - |
| 1978 New York Mets | 36 | $150,000.00 | - | - |
| 1979 Minnesota Twins | 36 | $150,000.00 | - | - |
| 1980 Minnesota Twins | 36 | $150,000.00 | - | - |
| 1981 Minnesota Twins | 36 | $150,000.00 | - | - |
| 1981 Chicago White Sox | 36 | " " | - | - |
| 1982 Chicago White Sox | 36 | $350,000.00 | - | - |
| 1983 Chicago White Sox | 36 | $450,000.00 | - | - |
| 1984 Philadelphia Phillies | 37, 24 | $591,000.00 | - | - |
| 1985 Philadelphia Phillies | 24 | $600,000.00 | - | - |
| Jerry Koosman Stats by Baseball Almanac | ||||

Jerome Martin Koosman was a Major League Baseball player with the New York Mets (1967-1978), Minnesota Twins (1979-1981), Chicago White Sox (1981-1983), and Philadelphia Phillies (1984-1985). Jerry, his nickname, did not win the Rookie of the Year Award in 1968, but he did win nineteen games that year, breaking the New York Mets' record for most wins in a season by a rookie pitcher (a mark that still stands, through today), set previously by Tom Seaver, who won sixteen games in 1967.

Jerry Koosman Rookie Card | 1968 Topps Baseball Card (#177 | Checklist)
Baseball Almanac Research Library
Did you know that Jerry Koosman served during the Vietnam War? He is one of fifty-four former Major League baseball players who are also veterans of the Vietnam War. A complete list of those who served their country in the armed forces during the Vietnam War appears below:
When Jerry Koosman mowed down 200 batters in 1976, he became the second New York Mets left-handed twirler to fashion a 200-or-more strikeout season, joining what record-setting (most strikeouts in a season by a Mets left-handed pitcher / since broken by Johan Santana) pitcher from 1973? [Answer]