Bob James vs. Roy Mahaffey — Career Comparison

Bob James
Baby BoomersCaliforniaThrows RightBats RightNorth AmericaChicago White SoxAmerican LeagueRelief Pitcher
Roy Mahaffey
Greatest GenerationSouth CarolinaThrows RightBats RightNorth AmericaPhiladelphia AthleticsAmerican LeagueStarting Pitcher

Roy Mahaffey built a career as a starting pitcher and Bob James as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Bob James posted stronger surface numbers — ERA 3.8 and WHIP 1.371 compared to 5.01 and 1.546 for Roy Mahaffey. By the career numbers, Bob James had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Bob James and Roy Mahaffey

Bob James
Career
Per 9 Innings
8
8
Roy Mahaffey
Careerverified
Per 9 Inningsverified
9
9
Bob James
Careerverified
Per 9 Inningsverified
279
6.17
Roy Mahaffey
Career
Per 9 Innings
224
1.91
Bob James
Career
Per 9 Innings
2
0.04
Roy Mahaffey
Careerverified
Per 9 Inningsverified
128
1.09
Bob James
Career
Per 9 Innings
24
0.53
Roy Mahaffey
Careerverified
Per 9 Inningsverified
67
0.57
Bob James
Careerverified
Per 9 Innings
26
0.57
Roy Mahaffey
Career
Per 9 Inningsverified
49
0.42
Bob James
Career
Per 9 Innings
48
48
Roy Mahaffey
Careerverified
Per 9 Inningsverified
57.76
57.76
Bob James
Career
Per 9 Innings
0.72
0.72
Roy Mahaffey
Careerverified
Per 9 Inningsverified
57.14
57.14
Bob James
Career
Per 9 Innings
0
0
Roy Mahaffey
Careerverified
Per 9 Inningsverified
45
0.38
Bob James
Career
Per 9 Innings
0
0
Roy Mahaffey
Career
Per 9 Innings
0
0
Bob James
Careerverified
Per 9 Inningsverified
73
1.61
Roy Mahaffey
Career
Per 9 Innings
5
0.04
Bob James
Careerverified
Per 9 Inningsverified
172
3.8
Roy Mahaffey
Career
Per 9 Innings
588
5.01
Bob James
Careerverified
Per 9 Inningsverified
3.8
3.8
Roy Mahaffey
Career
Per 9 Innings
5.01
5.01
Bob James
Careerverified
Per 9 Inningsverified
3.61
3.61
Roy Mahaffey
Career
Per 9 Innings
4.8
4.8
Bob James
Careerverified
Per 9 Inningsverified
3.86
3.86
Roy Mahaffey
Career
Per 9 Innings
4.7
4.7
Bob James
Careerverified
Per 9 Inningsverified
0.246
0.246
Roy Mahaffey
Career
Per 9 Innings
0.278
0.278
Bob James
Career
Per 9 Innings
1221
27
Roy Mahaffey
Careerverified
Per 9 Innings
3168
27
Bob James
Career
Per 9 Innings
407
9
Roy Mahaffey
Careerverified
Per 9 Innings
1056
9
Bob James
Careerverified
Per 9 Inningsverified
377
8.34
Roy Mahaffey
Career
Per 9 Innings
1181
10.07
Bob James
Careerverified
Per 9 Inningsverified
8.34
8.34
Roy Mahaffey
Career
Per 9 Innings
10.07
10.07
Bob James
Careerverified
Per 9 Innings
39
0.86
Roy Mahaffey
Career
Per 9 Inningsverified
84
0.72
Bob James
Career
Per 9 Innings
0.86
0.86
Roy Mahaffey
Careerverified
Per 9 Inningsverified
0.72
0.72
Bob James
Careerverified
Per 9 Inningsverified
0.14
0.14
Roy Mahaffey
Career
Per 9 Innings
0.38
0.38
Bob James
Careerverified
Per 9 Inningsverified
157
3.47
Roy Mahaffey
Career
Per 9 Innings
452
3.85
Bob James
Career
Per 9 Innings
24
0.53
Roy Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Bob James
Careerverified
Per 9 Inningsverified
3.47
3.47
Roy Mahaffey
Career
Per 9 Innings
3.85
3.85
Bob James
Career
Per 9 Inningsverified
340
7.52
Roy Mahaffey
Careerverified
Per 9 Innings
365
3.11
Bob James
Careerverified
Per 9 Inningsverified
7.52
7.52
Roy Mahaffey
Career
Per 9 Innings
3.11
3.11
Bob James
Career
Per 9 Innings
1.22
1.22
Roy Mahaffey
Careerverified
Per 9 Inningsverified
1.63
1.63
Bob James
Careerverified
Per 9 Inningsverified
1.221
1.221
Roy Mahaffey
Career
Per 9 Innings
0.774
0.774
Bob James
Careerverified
Per 9 Innings
24
0.53
Roy Mahaffey
Career
Per 9 Inningsverified
31
0.26
Bob James
Careerverified
Per 9 Innings
17
0.38
Roy Mahaffey
Career
Per 9 Inningsverified
24
0.2
Bob James
Career
Per 9 Innings
7
0.15
Roy Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Bob James
Career
Per 9 Innings
1755
38.81
Roy Mahaffey
Careerverified
Per 9 Inningsverified
4718
40.21
Bob James
Careerverified
Per 9 Inningsverified
194
4.29
Roy Mahaffey
Career
Per 9 Innings
47
0.4
Bob James
Careerverified
Per 9 Inningsverified
194
4.29
Roy Mahaffey
Career
Per 9 Innings
673
5.74
Bob James
Careerverified
Per 9 Inningsverified
4.29
4.29
Roy Mahaffey
Career
Per 9 Innings
5.74
5.74
Bob James
Career
Per 9 Innings
27
0.6
Roy Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Bob James
Career
Per 9 Innings
21
0.46
Roy Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Bob James
Careerverified
Per 9 Inningsverified
32
0.71
Roy Mahaffey
Career
Per 9 Innings
0
0
Bob James
Careerverified
Per 9 Inningsverified
1.312
1.312
Roy Mahaffey
Career
Per 9 Innings
1.546
1.546
Bob James
Career
Per 9 Innings
1533
33.9
Roy Mahaffey
Careerverified
Per 9 Inningsverified
4242
36.15
Bob James
Careerverified
Per 9 Inningsverified
0.7
0.7
Roy Mahaffey
Career
Per 9 Innings
3
3
Bob James
Career
Per 9 Innings
0.293
0.293
Roy Mahaffey
Careerverified
Per 9 Inningsverified
0.289
0.289
Bob James
Career
Per 9 Innings
38.81
38.81
Roy Mahaffey
Careerverified
Per 9 Inningsverified
40.21
40.21

Fielding Stats for Bob James and Roy Mahaffey

Bob James
Career
Per 9 Inningsverified
8
8
Roy Mahaffey
Careerverified
Per 9 Innings
9
Bob James
Careerverified
Per 9 Inningsverified
279
6.17
Roy Mahaffey
Career
Per 9 Innings
224
Bob James
Careerverified
Per 9 Inningsverified
2
0.04
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Careerverified
Per 9 Inningsverified
1221
27
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Careerverified
Per 9 Inningsverified
407
9
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Career
Per 9 Inningsverified
28
0.62
Roy Mahaffey
Careerverified
Per 9 Innings
34
Bob James
Career
Per 9 Inningsverified
47
1.04
Roy Mahaffey
Careerverified
Per 9 Innings
152
Bob James
Career
Per 9 Innings
13
0.29
Roy Mahaffey
Careerverified
Per 9 Inningsverified
12
Bob James
Career
Per 9 Inningsverified
88
1.95
Roy Mahaffey
Careerverified
Per 9 Innings
198
Bob James
Career
Per 9 Inningsverified
75
1.66
Roy Mahaffey
Careerverified
Per 9 Innings
186
Bob James
Career
Per 9 Inningsverified
85.23
85.23
Roy Mahaffey
Careerverified
Per 9 Innings
93.94
Bob James
Career
Per 9 Inningsverified
0.269
0.269
Roy Mahaffey
Careerverified
Per 9 Innings
0.83
Bob James
Careerverified
Per 9 Inningsverified
0.72
0.72
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Career
Per 9 Inningsverified
2
0.04
Roy Mahaffey
Careerverified
Per 9 Innings
11
Bob James
Career
Per 9 Innings
0
0
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Career
Per 9 Innings
0
0
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Career
Per 9 Innings
0
0
Roy Mahaffey
Career
Per 9 Innings
0
Bob James
Career
Per 9 Innings
0
0
Roy Mahaffey
Career
Per 9 Innings
0

Hitting Stats for Bob James and Roy Mahaffey

Bob James
Career
Per 600 PA
8
8
Roy Mahaffey
Careerverified
Per 600 PAverified
9
9
Bob James
Careerverified
Per 600 PAverified
279
7971.43
Roy Mahaffey
Career
Per 600 PA
224
321.53
Bob James
Career
Per 600 PA
21
600
Roy Mahaffey
Careerverified
Per 600 PA
418
600
Bob James
Career
Per 600 PAverified
21
600
Roy Mahaffey
Careerverified
Per 600 PA
396
568.42
Bob James
Careerverified
Per 600 PAverified
0.191
0.191
Roy Mahaffey
Career
Per 600 PA
0.184
0.184
Bob James
Career
Per 600 PA
0.381
0.381
Roy Mahaffey
Careerverified
Per 600 PAverified
0.474
0.474
Bob James
Career
Per 600 PAverified
4
114.29
Roy Mahaffey
Careerverified
Per 600 PA
73
104.78
Bob James
Career
Per 600 PAverified
4
114.29
Roy Mahaffey
Careerverified
Per 600 PA
59
84.69
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
9
12.92
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
1
1.44
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
4
5.74
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
14
20.1
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
0.192
0.192
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
0.01
0.01
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
0.055
0.055
Bob James
Career
Per 600 PA
0.69
19.6
Roy Mahaffey
Careerverified
Per 600 PAverified
21.77
31.25
Bob James
Career
Per 600 PA
4
114.29
Roy Mahaffey
Careerverified
Per 600 PAverified
96
137.8
Bob James
Career
Per 600 PA
4
114.29
Roy Mahaffey
Careerverified
Per 600 PAverified
87
124.88
Bob James
Career
Per 600 PA
0.191
0.191
Roy Mahaffey
Careerverified
Per 600 PAverified
0.212
0.212
Bob James
Career
Per 600 PA
0.191
0.191
Roy Mahaffey
Careerverified
Per 600 PAverified
0.242
0.242
Bob James
Career
Per 600 PA
0.381
0.381
Roy Mahaffey
Careerverified
Per 600 PAverified
0.455
0.455
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
0.058
0.058
Bob James
Career
Per 600 PA
0.133
0.133
Roy Mahaffey
Careerverified
Per 600 PAverified
0.156
0.156
Bob James
Career
Per 600 PA
0.235
0.235
Roy Mahaffey
Careerverified
Per 600 PAverified
0.341
0.341
Bob James
Careerverified
Per 600 PAverified
0.667
0.667
Roy Mahaffey
Career
Per 600 PA
0.273
0.273
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
28
40.19
Bob James
Career
Per 600 PAverified
2
57.14
Roy Mahaffey
Careerverified
Per 600 PA
33
47.37
Bob James
Career
Per 600 PA
2
57.14
Roy Mahaffey
Careerverified
Per 600 PAverified
57
81.82
Bob James
Career
Per 600 PA
0.5
14.28
Roy Mahaffey
Careerverified
Per 600 PAverified
18.88
27.11
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
14
20.1
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Careerverified
Per 600 PA
15
428.57
Roy Mahaffey
Career
Per 600 PAverified
139
199.52
Bob James
Career
Per 600 PA
1.4
1.4
Roy Mahaffey
Careerverified
Per 600 PAverified
3.01
3.01
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
0.1
0.1
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Careerverified
Per 600 PAverified
8
11.48
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Career
Per 600 PA
0
0
Roy Mahaffey
Career
Per 600 PA
0
0
Bob James
Career
Per 600 PA
Roy Mahaffey
Career
Per 600 PA