Jerry Koosman Career Pitching Summary

  • May 7, 2025

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.

🧾 Basic Profile

Jerry Koosman
NameJerry Koosman
Date of BirthDecember 23, 1942
Nationality
United States
PositionPitcher
ThrowsLeft
BatsRight
MLB Debut1967
Beautiful Chart

Jerry Koosman Yearly Pitching Stats

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

Parsing Data

Data Source: Baseball Reference

Image Source: Wikipedia

📊 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: 40)
GF43 (MLB Rank: 1,931)
W222 (MLB Rank: 78)
L209 (MLB Rank: 37)
SV17 (MLB Rank: 867)
ERA3.36 (MLB Rank: 2,123)
IP3839.1 (MLB Rank: 48)
SHO33 (MLB Rank: 87)
CG140 (MLB Rank: 253)
SO2,556 (MLB Rank: 35)
BB1198 (MLB Rank: 53)
H3,635 (MLB Rank: 54)
HR290 (MLB Rank: 74)
SO95.99 (MLB Rank: 4,119)
BB92.81 (MLB Rank: 9,148)
H98.52 (MLB Rank: 8,829)
HR90.68 (MLB Rank: 6,404)
WHIP1.259 (MLB Rank: 10,048)
WAR57.0 (MLB Rank: 76)

📊 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