Jerry Koosman Career Pitching Summary

Jerry Koosman played in Major League Baseball from 1967 to 1985, appearing in 612 games over 19 seasons. He recorded a total of 222 W and 209 L, an ERA of 3.36, 2,556 SO, a WHIP of 1.259, and a WAR of 57.0.

Jerry Koosman Yearly Pitching Stats

This chart shows the season-by-season changes in ERA, SO, and IP for Jerry Koosman.

Change Chart

    🧾 Basic Profile

    Jerry Koosman
    NameJerry Koosman
    Date of BirthDecember 23, 1942
    Nationality
    United States
    MLB Debut1967

    📊 Career Summary

    Jerry Koosman appeared in 612 games over 19 MLB seasons from 1967 to 1985. Below are his cumulative stats and MLB all-time rankings:

    GS527 (MLB Rank: 39)
    GF43 (MLB Rank: 1,900)
    W222 (MLB Rank: 77)
    L209 (MLB Rank: 37)
    SV17 (MLB Rank: 859)
    ERA3.36 (MLB Rank: 2,104)
    IP3839.1 (MLB Rank: 48)
    SHO33 (MLB Rank: 87)
    CG140 (MLB Rank: 253)
    SO2,556 (MLB Rank: 34)
    BB1198 (MLB Rank: 53)
    H3,635 (MLB Rank: 54)
    HR290 (MLB Rank: 74)
    SO95.99 (MLB Rank: 3,982)
    BB92.81 (MLB Rank: 9,005)
    H98.52 (MLB Rank: 8,722)
    HR90.68 (MLB Rank: 6,253)
    WHIP1.259 (MLB Rank: 9,920)
    WAR57.0 (MLB Rank: 75)

    📊 Last Season Summary (1985)

    In his final season (1985), Jerry Koosman recorded the following stats:

    GS18
    W6
    L4
    ERA4.62
    IP99.1
    SHO1
    CG3
    SO60
    BB34
    H107
    HR14
    SO95.44
    BB93.08
    H99.69
    HR91.27
    WHIP1.419
    WAR0.5

    📈 Seasonal Highlights

    • Most Wins: 1976, 21 W
    • Most SO: 1976, 200 SO
    • Most IP: 1974, 265 IP
    • Best WAR: 1979, 7.2 WAR
    • Best ERA: 1968, 2.09 ERA

    🎯 Postseason Performance

    Jerry Koosman appeared in 7 games during the postseason. He recorded an ERA of 3.88, pitched 39.4 IP, struck out 31 batters, with 4 W and 0 L.

    Jerry Koosman Career Pitching Stats Overview

    seasonWLERAW-L%SVSOIPWARWHIPHRHBBRERERA+FIPSO9SO/BBGSGGFCGSHOHR9H9BB9BKHBPIBBWPBF
    1967
    0
    2
    6.04
    0
    0
    11
    22.1
    -0.5
    1.836
    3
    22
    19
    17
    15
    57
    5.85
    4.4
    0.58
    3
    9
    1
    0
    0
    1.2
    8.9
    7.7
    1
    0
    4
    0
    105
    1968
    19
    12
    2.08
    0.613
    0
    178
    263.2
    6.3
    1.1
    16
    221
    69
    72
    61
    145
    2.7
    6.1
    2.58
    34
    35
    0
    17
    7
    0.5
    7.5
    2.4
    0
    8
    7
    8
    1058
    1969
    17
    9
    2.28
    0.654
    0
    180
    241
    5.9
    1.058
    14
    187
    68
    66
    61
    160
    2.67
    6.7
    2.65
    32
    32
    0
    16
    6
    0.5
    7
    2.5
    2
    4
    11
    7
    957
    1970
    12
    7
    3.14
    0.632
    0
    118
    212
    3
    1.226
    22
    189
    71
    87
    74
    128
    3.91
    5
    1.66
    29
    30
    0
    5
    1
    0.9
    8
    3
    3
    2
    14
    7
    884
    1971
    6
    11
    3.04
    0.353
    0
    96
    165.2
    2.4
    1.274
    12
    160
    51
    66
    56
    112
    3.18
    5.2
    1.88
    24
    26
    0
    4
    0
    0.7
    8.7
    2.8
    0
    1
    4
    7
    694
    1972
    11
    12
    4.14
    0.478
    1
    147
    163
    0.4
    1.27
    14
    155
    52
    81
    75
    81
    2.78
    8.1
    2.83
    24
    34
    5
    4
    1
    0.8
    8.6
    2.9
    0
    6
    7
    9
    692
    1973
    14
    15
    2.84
    0.483
    0
    156
    263
    5.8
    1.179
    18
    234
    76
    93
    83
    128
    3.18
    5.3
    2.05
    35
    35
    0
    12
    3
    0.6
    8
    2.6
    0
    4
    6
    3
    1071
    1974
    15
    11
    3.36
    0.577
    0
    188
    265
    4.9
    1.294
    16
    258
    85
    113
    99
    107
    2.99
    6.4
    2.21
    35
    35
    0
    13
    0
    0.5
    8.8
    2.9
    1
    7
    7
    8
    1118
    1975
    14
    13
    3.42
    0.519
    2
    173
    239.2
    2.1
    1.385
    19
    234
    98
    106
    91
    101
    3.45
    6.5
    1.77
    34
    36
    2
    11
    4
    0.7
    8.8
    3.7
    7
    4
    6
    7
    1018
    1976
    21
    10
    2.69
    0.677
    0
    200
    247.1
    4.7
    1.096
    19
    205
    66
    81
    74
    121
    2.83
    7.3
    3.03
    32
    34
    0
    17
    3
    0.7
    7.5
    2.4
    1
    1
    7
    3
    994
    1977
    8
    20
    3.49
    0.286
    0
    192
    226.2
    2.9
    1.218
    17
    195
    81
    102
    88
    107
    3.14
    7.6
    2.37
    32
    32
    0
    6
    1
    0.7
    7.7
    3.2
    4
    4
    8
    2
    940
    1978
    3
    15
    3.75
    0.167
    2
    160
    235.1
    1.5
    1.296
    17
    221
    84
    110
    98
    93
    3.34
    6.1
    1.9
    32
    38
    6
    3
    0
    0.7
    8.5
    3.2
    1
    8
    11
    5
    986
    1979
    20
    13
    3.38
    0.606
    0
    157
    263.2
    7.2
    1.331
    19
    268
    83
    108
    99
    130
    3.46
    5.4
    1.89
    36
    37
    0
    10
    2
    0.6
    9.1
    2.8
    1
    3
    4
    2
    1101
    1980
    16
    13
    4.03
    0.552
    2
    149
    243.1
    3
    1.319
    24
    252
    69
    119
    109
    108
    3.72
    5.5
    2.16
    34
    38
    2
    8
    0
    0.9
    9.3
    2.6
    1
    5
    5
    2
    1022
    1981
    4
    13
    4.01
    0.235
    5
    76
    121.1
    1.2
    1.368
    10
    125
    41
    59
    54
    97
    3.43
    5.6
    1.85
    16
    27
    9
    3
    1
    0.7
    9.3
    3
    1
    0
    7
    2
    517
    1982
    11
    7
    3.84
    0.611
    3
    88
    173.1
    2.7
    1.338
    9
    194
    38
    81
    74
    105
    3.07
    4.6
    2.32
    19
    42
    12
    3
    1
    0.5
    10.1
    2
    2
    2
    3
    4
    726
    1983
    11
    7
    4.77
    0.611
    2
    90
    169.2
    0
    1.35
    19
    176
    53
    96
    90
    88
    4.19
    4.8
    1.7
    24
    37
    6
    2
    1
    1
    9.3
    2.8
    0
    6
    2
    5
    730
    1984
    14
    15
    3.25
    0.483
    0
    137
    224
    3
    1.304
    8
    232
    60
    95
    81
    112
    2.85
    5.5
    2.28
    34
    36
    0
    3
    1
    0.3
    9.3
    2.4
    2
    3
    5
    6
    950
    1985
    6
    4
    4.62
    0.6
    0
    60
    99.1
    0.5
    1.419
    14
    107
    34
    56
    51
    81
    4.43
    5.4
    1.76
    18
    19
    0
    3
    1
    1.3
    9.7
    3.1
    2
    3
    3
    2
    433