Jeremy Affeldt vs. Willie Jefferson — Career Comparison

Jeremy Affeldt
Gen XArizonaThrows LeftBats LeftNorth AmericaSan Francisco GiantsNational LeagueRelief Pitcher
Willie Jefferson
Greatest GenerationOklahomaThrows RightBats RightNorth AmericaCleveland BuckeyesNegro American LeagueStarting Pitcher

Willie Jefferson built a career as a starting pitcher and Jeremy Affeldt as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Willie Jefferson posted stronger surface numbers — ERA 3.94 and WHIP 1.314 compared to 3.97 and 1.448 for Jeremy Affeldt. By the career numbers, Willie Jefferson had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Jeremy Affeldt and Willie Jefferson

Jeremy Affeldt
Careerverified
Per 9 Inningsverified
14
14
Willie Jefferson
Career
Per 9 Innings
8
8
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
774
7.52
Willie Jefferson
Career
Per 9 Innings
66
1.49
Jeremy Affeldt
Career
Per 9 Innings
42
0.41
Willie Jefferson
Careerverified
Per 9 Inningsverified
46
1.04
Jeremy Affeldt
Careerverified
Per 9 Innings
43
0.42
Willie Jefferson
Career
Per 9 Inningsverified
22
0.5
Jeremy Affeldt
Career
Per 9 Inningsverified
46
0.45
Willie Jefferson
Careerverified
Per 9 Innings
24
0.54
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
48.31
48.31
Willie Jefferson
Career
Per 9 Innings
47.83
47.83
Jeremy Affeldt
Career
Per 9 Innings
5.43
5.43
Willie Jefferson
Careerverified
Per 9 Inningsverified
69.7
69.7
Jeremy Affeldt
Career
Per 9 Innings
0
0
Willie Jefferson
Careerverified
Per 9 Inningsverified
34
0.77
Jeremy Affeldt
Career
Per 9 Innings
0
0
Willie Jefferson
Careerverified
Per 9 Inningsverified
3
0.07
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
28
0.27
Willie Jefferson
Career
Per 9 Innings
1
0.02
Jeremy Affeldt
Career
Per 9 Innings
408
3.97
Willie Jefferson
Careerverified
Per 9 Inningsverified
175
3.94
Jeremy Affeldt
Career
Per 9 Innings
3.97
3.97
Willie Jefferson
Careerverified
Per 9 Inningsverified
3.94
3.94
Jeremy Affeldt
Career
Per 9 Innings
4.02
4.02
Willie Jefferson
Careerverified
Per 9 Inningsverified
3.47
3.47
Jeremy Affeldt
Career
Per 9 Innings
3.93
3.93
Willie Jefferson
Careerverified
Per 9 Inningsverified
3.2
3.2
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
0.256
0.256
Willie Jefferson
Career
Per 9 Innings
0.271
0.271
Jeremy Affeldt
Careerverified
Per 9 Innings
2778
27
Willie Jefferson
Career
Per 9 Innings
1199
27
Jeremy Affeldt
Careerverified
Per 9 Innings
926
9
Willie Jefferson
Career
Per 9 Innings
399.2
9
Jeremy Affeldt
Career
Per 9 Inningsverified
904
8.79
Willie Jefferson
Careerverified
Per 9 Innings
439
9.89
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
8.79
8.79
Willie Jefferson
Career
Per 9 Innings
9.89
9.89
Jeremy Affeldt
Career
Per 9 Innings
76
0.74
Willie Jefferson
Careerverified
Per 9 Inningsverified
18
0.41
Jeremy Affeldt
Career
Per 9 Innings
0.74
0.74
Willie Jefferson
Careerverified
Per 9 Inningsverified
0.41
0.41
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
0.1
0.1
Willie Jefferson
Career
Per 9 Innings
0.27
0.27
Jeremy Affeldt
Career
Per 9 Innings
396
3.85
Willie Jefferson
Careerverified
Per 9 Inningsverified
86
1.94
Jeremy Affeldt
Career
Per 9 Innings
41
0.4
Willie Jefferson
Careerverified
Per 9 Inningsverified
0
0
Jeremy Affeldt
Career
Per 9 Innings
3.85
3.85
Willie Jefferson
Careerverified
Per 9 Inningsverified
1.94
1.94
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
720
7
Willie Jefferson
Career
Per 9 Innings
215
4.84
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
7
7
Willie Jefferson
Career
Per 9 Innings
4.84
4.84
Jeremy Affeldt
Career
Per 9 Innings
0.93
0.93
Willie Jefferson
Careerverified
Per 9 Inningsverified
3.26
3.26
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
1.205
1.205
Willie Jefferson
Career
Per 9 Innings
0.753
0.753
Jeremy Affeldt
Career
Per 9 Innings
55
0.53
Willie Jefferson
Careerverified
Per 9 Inningsverified
4
0.09
Jeremy Affeldt
Career
Per 9 Innings
42
0.41
Willie Jefferson
Careerverified
Per 9 Inningsverified
6
0.14
Jeremy Affeldt
Career
Per 9 Innings
9
0.09
Willie Jefferson
Careerverified
Per 9 Inningsverified
1
0.02
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
4034
39.21
Willie Jefferson
Career
Per 9 Innings
1737
39.12
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
162
1.57
Willie Jefferson
Career
Per 9 Innings
15
0.34
Jeremy Affeldt
Career
Per 9 Inningsverified
455
4.42
Willie Jefferson
Careerverified
Per 9 Innings
228
5.13
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
4.42
4.42
Willie Jefferson
Career
Per 9 Innings
5.13
5.13
Jeremy Affeldt
Career
Per 9 Inningsverified
42
0.41
Willie Jefferson
Careerverified
Per 9 Innings
25
0.56
Jeremy Affeldt
Career
Per 9 Innings
25
0.24
Willie Jefferson
Careerverified
Per 9 Inningsverified
2
0.05
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
102
0.99
Willie Jefferson
Career
Per 9 Innings
18
0.41
Jeremy Affeldt
Career
Per 9 Innings
1.404
1.404
Willie Jefferson
Careerverified
Per 9 Inningsverified
1.314
1.314
Jeremy Affeldt
Careerverified
Per 9 Innings
3529
34.3
Willie Jefferson
Career
Per 9 Inningsverified
1618
36.44
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
0.59
0.59
Willie Jefferson
Career
Per 9 Innings
3.45
3.45
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
0.303
0.303
Willie Jefferson
Career
Per 9 Innings
0.304
0.304
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
39.21
39.21
Willie Jefferson
Career
Per 9 Innings
39.12
39.12

Fielding Stats for Jeremy Affeldt and Willie Jefferson

Jeremy Affeldt
Careerverified
Per 9 Inningsverified
14
14
Willie Jefferson
Career
Per 9 Innings
8
8
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
774
7.52
Willie Jefferson
Career
Per 9 Innings
75
1.52
Jeremy Affeldt
Career
Per 9 Innings
42
0.41
Willie Jefferson
Careerverified
Per 9 Inningsverified
51
1.04
Jeremy Affeldt
Careerverified
Per 9 Innings
2778
27
Willie Jefferson
Career
Per 9 Innings
1329
27
Jeremy Affeldt
Careerverified
Per 9 Innings
926
9
Willie Jefferson
Career
Per 9 Innings
443
9
Jeremy Affeldt
Careerverified
Per 9 Innings
45
0.44
Willie Jefferson
Career
Per 9 Inningsverified
25
0.51
Jeremy Affeldt
Careerverified
Per 9 Innings
184
1.79
Willie Jefferson
Career
Per 9 Inningsverified
129
2.62
Jeremy Affeldt
Career
Per 9 Innings
13
0.13
Willie Jefferson
Careerverified
Per 9 Inningsverified
6
0.12
Jeremy Affeldt
Careerverified
Per 9 Innings
242
2.35
Willie Jefferson
Career
Per 9 Inningsverified
160
3.25
Jeremy Affeldt
Careerverified
Per 9 Innings
229
2.23
Willie Jefferson
Career
Per 9 Inningsverified
154
3.13
Jeremy Affeldt
Career
Per 9 Innings
94.63
94.63
Willie Jefferson
Careerverified
Per 9 Inningsverified
96.25
96.25
Jeremy Affeldt
Career
Per 9 Innings
0.296
0.296
Willie Jefferson
Careerverified
Per 9 Inningsverified
2.053
2.053
Jeremy Affeldt
Career
Per 9 Innings
5.43
5.43
Willie Jefferson
Careerverified
Per 9 Inningsverified
68
68
Jeremy Affeldt
Careerverified
Per 9 Inningsverified
13
0.13
Willie Jefferson
Career
Per 9 Innings
2
0.04
Jeremy Affeldt
Career
Per 9 Innings
0
0
Willie Jefferson
Career
Per 9 Innings
0
0
Jeremy Affeldt
Career
Per 9 Innings
0
0
Willie Jefferson
Career
Per 9 Innings
0
0
Jeremy Affeldt
Career
Per 9 Innings
0
0
Willie Jefferson
Career
Per 9 Innings
0
0
Jeremy Affeldt
Career
Per 9 Innings
0
0
Willie Jefferson
Career
Per 9 Innings
0
0

Hitting Stats for Jeremy Affeldt and Willie Jefferson

Jeremy Affeldt
Careerverified
Per 600 PAverified
14
14
Willie Jefferson
Career
Per 600 PA
8
8
Jeremy Affeldt
Careerverified
Per 600 PAverified
774
24442.11
Willie Jefferson
Career
Per 600 PA
77
241.88
Jeremy Affeldt
Career
Per 600 PA
19
600
Willie Jefferson
Careerverified
Per 600 PA
191
600
Jeremy Affeldt
Career
Per 600 PA
17
536.84
Willie Jefferson
Careerverified
Per 600 PAverified
179
562.3
Jeremy Affeldt
Career
Per 600 PA
0.177
0.177
Willie Jefferson
Careerverified
Per 600 PAverified
0.235
0.235
Jeremy Affeldt
Career
Per 600 PA
0.474
0.474
Willie Jefferson
Careerverified
Per 600 PAverified
0.598
0.598
Jeremy Affeldt
Career
Per 600 PA
3
94.74
Willie Jefferson
Careerverified
Per 600 PAverified
42
131.94
Jeremy Affeldt
Career
Per 600 PA
3
94.74
Willie Jefferson
Careerverified
Per 600 PAverified
33
103.66
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
6
18.85
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
1
3.14
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
2
6.28
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
9
28.27
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
0.214
0.214
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
0.011
0.011
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
0.048
0.048
Jeremy Affeldt
Career
Per 600 PA
0.85
26.78
Willie Jefferson
Careerverified
Per 600 PAverified
14.73
46.28
Jeremy Affeldt
Career
Per 600 PA
3
94.74
Willie Jefferson
Careerverified
Per 600 PAverified
56
175.92
Jeremy Affeldt
Career
Per 600 PAverified
5
157.89
Willie Jefferson
Careerverified
Per 600 PA
47
147.64
Jeremy Affeldt
Careerverified
Per 600 PAverified
0.263
0.263
Willie Jefferson
Career
Per 600 PA
0.255
0.255
Jeremy Affeldt
Career
Per 600 PA
0.177
0.177
Willie Jefferson
Careerverified
Per 600 PAverified
0.313
0.313
Jeremy Affeldt
Career
Per 600 PA
0.44
0.44
Willie Jefferson
Careerverified
Per 600 PAverified
0.568
0.568
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
0.078
0.078
Jeremy Affeldt
Career
Per 600 PA
0.163
0.163
Willie Jefferson
Careerverified
Per 600 PAverified
0.193
0.193
Jeremy Affeldt
Career
Per 600 PA
0.357
0.357
Willie Jefferson
Careerverified
Per 600 PAverified
0.464
0.464
Jeremy Affeldt
Careerverified
Per 600 PAverified
0.273
0.273
Willie Jefferson
Career
Per 600 PA
0.226
0.226
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
17
53.4
Jeremy Affeldt
Career
Per 600 PA
2
63.16
Willie Jefferson
Careerverified
Per 600 PAverified
21
65.97
Jeremy Affeldt
Career
Per 600 PA
2
63.16
Willie Jefferson
Careerverified
Per 600 PAverified
36
113.09
Jeremy Affeldt
Career
Per 600 PA
0.98
30.85
Willie Jefferson
Careerverified
Per 600 PAverified
16.26
51.07
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
2
6.28
Jeremy Affeldt
Career
Per 600 PAverified
2
63.16
Willie Jefferson
Careerverified
Per 600 PA
3
9.42
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Career
Per 600 PA
0
0
Jeremy Affeldt
Career
Per 600 PA
6
189.47
Willie Jefferson
Careerverified
Per 600 PAverified
0
0
Jeremy Affeldt
Careerverified
Per 600 PAverified
3.17
3.17
Willie Jefferson
Career
Per 600 PA
Jeremy Affeldt
Careerverified
Per 600 PAverified
0.33
0.33
Willie Jefferson
Career
Per 600 PA
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
7
21.99
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Career
Per 600 PA
0
0
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Career
Per 600 PA
0
0
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
3
9.42
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
1
3.14
Jeremy Affeldt
Career
Per 600 PA
0
0
Willie Jefferson
Careerverified
Per 600 PAverified
4
12.57
Jeremy Affeldt
Career
Per 600 PA
Willie Jefferson
Careerverified
Per 600 PAverified
75
75