MLB · Career head-to-head

Bob WelchvsJerry Koosman

Regular-season careers from the StatVault encyclopedia — the same tables as each player's profile.

P · VAL group PITCH

Bob Welch

1978–1994 · 17 seasons

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P · VAL group PITCH

Jerry Koosman

1967–1985 · 19 seasons

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At a glance

Bob Welch and Jerry Koosman: seasons, VAL, honors and league-leading seasons
Bob Welch	Stat	Jerry Koosman
17	Seasons	19
86.7	Career VAL	93.3
11.6 (1987)	Peak-season VAL	10.2 (1969)
1×	Cy Young Awards	—
2×	All-Star Selections	2×
1	Black ink (league-leading seasons)	0
2	Gray ink (top-10 finishes)	6

VAL is Value Above League — regular-season production measured against the league at the same position group (MLB VAL board). Black and gray ink count seasons from 1950 on.

Career regular season

Career regular-season statistics both Bob Welch and Jerry Koosman have
Bob Welch	Stat	Jerry Koosman
Career
520	Games	612
Batting
88	Hits	109
2	Home runs	2
30	RBI	46
26	Runs	36
0	Stolen bases	1
22

VAL by ageEach season plotted at the player's age that season, so careers line up by age rather than by calendar.

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Pitching
211	Wins	222
146	Losses	209
8	Saves	17
3092.0	Innings pitched	3839.1
1,969	Strikeouts (pitching)	2,556
3.47	ERA	3.36
1.27	WHIP	1.26
109	ERA+	110

Age	Bob Welch	Jerry Koosman
21	5.6	—
22	1.3	—
23	6.1	—
24	2.7	—
25	7.8	6.9
26	8.2	10.2
27	4.1	6.4
28	8.1	3.7
29	10.3	0
30	11.6	9.6
31	4.2	6.2
32	6.3	4.2
33	7.1	7.5
34	0.9	7.3
35	2.4	4
36	0	8
37	0	4.3
38	—	1
39	—	4.2
40	—	1.2
41	—	8.6
42	—	0