Jack Leiper vs. Art Mahaffey — Career Comparison

Jack Leiper
Pre-GenerationalPennsylvaniaThrows LeftBats LeftNorth AmericaColumbus SolonsAmerican AssociationRelief Pitcher
Art Mahaffey
Silent GenerationOhioThrows RightBats RightNorth AmericaPhiladelphia PhilliesNational LeagueStarting PitcherAll-Star

Art Mahaffey built a career as a starting pitcher and Jack Leiper as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Art Mahaffey posted stronger surface numbers — ERA 4.17 and WHIP 1.351 compared to 5.4 and 1.778 for Jack Leiper. By the career numbers, Art Mahaffey had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Jack Leiper and Art Mahaffey

Jack Leiper
Career
Per 9 Innings
1
1
Art Mahaffey
Careerverified
Per 9 Inningsverified
7
7
Jack Leiper
Career
Per 9 Innings
6
1.2
Art Mahaffey
Careerverified
Per 9 Inningsverified
185
1.67
Jack Leiper
Career
Per 9 Innings
5
1
Art Mahaffey
Careerverified
Per 9 Inningsverified
148
1.33
Jack Leiper
Career
Per 9 Innings
2
0.4
Art Mahaffey
Careerverified
Per 9 Inningsverified
59
0.53
Jack Leiper
Careerverified
Per 9 Inningsverified
2
0.4
Art Mahaffey
Career
Per 9 Innings
64
0.58
Jack Leiper
Careerverified
Per 9 Inningsverified
50
50
Art Mahaffey
Career
Per 9 Innings
47.97
47.97
Jack Leiper
Careerverified
Per 9 Inningsverified
83.33
83.33
Art Mahaffey
Career
Per 9 Innings
80
80
Jack Leiper
Career
Per 9 Inningsverified
4
0.8
Art Mahaffey
Careerverified
Per 9 Innings
46
0.41
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Careerverified
Per 9 Inningsverified
9
0.08
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Careerverified
Per 9 Inningsverified
1
0.01
Jack Leiper
Careerverified
Per 9 Innings
27
5.4
Art Mahaffey
Career
Per 9 Inningsverified
463
4.17
Jack Leiper
Career
Per 9 Innings
5.4
5.4
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.17
4.17
Jack Leiper
Career
Per 9 Innings
5.39
5.39
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.05
4.05
Jack Leiper
Career
Per 9 Innings
5.89
5.89
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.57
4.57
Jack Leiper
Careerverified
Per 9 Inningsverified
0.234
0.234
Art Mahaffey
Career
Per 9 Innings
0.249
0.249
Jack Leiper
Career
Per 9 Innings
135
27
Art Mahaffey
Careerverified
Per 9 Innings
2997
27
Jack Leiper
Career
Per 9 Innings
45
9
Art Mahaffey
Careerverified
Per 9 Innings
999
9
Jack Leiper
Careerverified
Per 9 Inningsverified
41
8.2
Art Mahaffey
Career
Per 9 Innings
959
8.64
Jack Leiper
Careerverified
Per 9 Inningsverified
8.2
8.2
Art Mahaffey
Career
Per 9 Innings
8.64
8.64
Jack Leiper
Careerverified
Per 9 Inningsverified
3
0.6
Art Mahaffey
Career
Per 9 Innings
125
1.13
Jack Leiper
Careerverified
Per 9 Inningsverified
0.6
0.6
Art Mahaffey
Career
Per 9 Innings
1.13
1.13
Jack Leiper
Careerverified
Per 9 Inningsverified
0.5
0.5
Art Mahaffey
Career
Per 9 Innings
0.68
0.68
Jack Leiper
Careerverified
Per 9 Innings
39
7.8
Art Mahaffey
Career
Per 9 Inningsverified
368
3.32
Jack Leiper
Careerverified
Per 9 Inningsverified
0
0
Art Mahaffey
Career
Per 9 Innings
23
0.21
Jack Leiper
Career
Per 9 Innings
7.8
7.8
Art Mahaffey
Careerverified
Per 9 Inningsverified
3.32
3.32
Jack Leiper
Career
Per 9 Innings
19
3.8
Art Mahaffey
Careerverified
Per 9 Inningsverified
639
5.76
Jack Leiper
Career
Per 9 Innings
3.8
3.8
Art Mahaffey
Careerverified
Per 9 Inningsverified
5.76
5.76
Jack Leiper
Career
Per 9 Innings
3.17
3.17
Art Mahaffey
Careerverified
Per 9 Inningsverified
3.45
3.45
Jack Leiper
Careerverified
Per 9 Inningsverified
1.289
1.289
Art Mahaffey
Career
Per 9 Innings
1.008
1.008
Jack Leiper
Careerverified
Per 9 Innings
3
0.6
Art Mahaffey
Career
Per 9 Inningsverified
37
0.33
Jack Leiper
Careerverified
Per 9 Innings
4
0.8
Art Mahaffey
Career
Per 9 Inningsverified
39
0.35
Jack Leiper
Careerverified
Per 9 Inningsverified
0
0
Art Mahaffey
Career
Per 9 Innings
4
0.04
Jack Leiper
Career
Per 9 Inningsverified
218
43.6
Art Mahaffey
Careerverified
Per 9 Innings
4252
38.31
Jack Leiper
Career
Per 9 Inningsverified
1
0.2
Art Mahaffey
Careerverified
Per 9 Innings
10
0.09
Jack Leiper
Careerverified
Per 9 Innings
43
8.6
Art Mahaffey
Career
Per 9 Inningsverified
507
4.57
Jack Leiper
Career
Per 9 Innings
8.6
8.6
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.57
4.57
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Leiper
Career
Per 9 Innings
1.778
1.778
Art Mahaffey
Careerverified
Per 9 Inningsverified
1.328
1.328
Jack Leiper
Career
Per 9 Inningsverified
175
35
Art Mahaffey
Careerverified
Per 9 Innings
3845
34.64
Jack Leiper
Career
Per 9 Innings
7.17
7.17
Art Mahaffey
Careerverified
Per 9 Inningsverified
2.74
2.74
Jack Leiper
Careerverified
Per 9 Inningsverified
0.248
0.248
Art Mahaffey
Career
Per 9 Innings
0.271
0.271
Jack Leiper
Careerverified
Per 9 Inningsverified
43.6
43.6
Art Mahaffey
Career
Per 9 Innings
38.31
38.31

Fielding Stats for Jack Leiper and Art Mahaffey

Jack Leiper
Career
Per 9 Innings
1
1
Art Mahaffey
Careerverified
Per 9 Inningsverified
7
7
Jack Leiper
Career
Per 9 Innings
7
1.26
Art Mahaffey
Careerverified
Per 9 Inningsverified
185
1.67
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Careerverified
Per 9 Inningsverified
148
1.33
Jack Leiper
Career
Per 9 Innings
150
27
Art Mahaffey
Careerverified
Per 9 Innings
2997
27
Jack Leiper
Career
Per 9 Innings
50
9
Art Mahaffey
Careerverified
Per 9 Innings
999
9
Jack Leiper
Career
Per 9 Inningsverified
4
0.72
Art Mahaffey
Careerverified
Per 9 Innings
56
0.5
Jack Leiper
Career
Per 9 Inningsverified
8
1.44
Art Mahaffey
Careerverified
Per 9 Innings
116
1.05
Jack Leiper
Careerverified
Per 9 Innings
3
0.54
Art Mahaffey
Career
Per 9 Inningsverified
5
0.05
Jack Leiper
Career
Per 9 Inningsverified
15
2.7
Art Mahaffey
Careerverified
Per 9 Innings
177
1.59
Jack Leiper
Career
Per 9 Inningsverified
12
2.16
Art Mahaffey
Careerverified
Per 9 Innings
172
1.55
Jack Leiper
Career
Per 9 Innings
80
80
Art Mahaffey
Careerverified
Per 9 Inningsverified
97.18
97.18
Jack Leiper
Careerverified
Per 9 Inningsverified
1.714
1.714
Art Mahaffey
Career
Per 9 Innings
0.93
0.93
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Careerverified
Per 9 Inningsverified
80
80
Jack Leiper
Career
Per 9 Inningsverified
1
0.18
Art Mahaffey
Careerverified
Per 9 Innings
5
0.05
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Leiper
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0

Hitting Stats for Jack Leiper and Art Mahaffey

Jack Leiper
Career
Per 600 PA
1
1
Art Mahaffey
Careerverified
Per 600 PAverified
7
7
Jack Leiper
Career
Per 600 PA
6
171.43
Art Mahaffey
Careerverified
Per 600 PAverified
186
310
Jack Leiper
Career
Per 600 PA
21
600
Art Mahaffey
Careerverified
Per 600 PA
360
600
Jack Leiper
Career
Per 600 PAverified
21
600
Art Mahaffey
Careerverified
Per 600 PA
313
521.67
Jack Leiper
Careerverified
Per 600 PAverified
0.143
0.143
Art Mahaffey
Career
Per 600 PA
0.134
0.134
Jack Leiper
Career
Per 600 PA
0.286
0.286
Art Mahaffey
Careerverified
Per 600 PAverified
0.428
0.428
Jack Leiper
Career
Per 600 PAverified
3
85.71
Art Mahaffey
Careerverified
Per 600 PA
42
70
Jack Leiper
Career
Per 600 PAverified
3
85.71
Art Mahaffey
Careerverified
Per 600 PA
31
51.67
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
7
11.67
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
1
1.67
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
3
5
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
11
18.33
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.262
0.262
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.01
0.01
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.071
0.071
Jack Leiper
Career
Per 600 PA
0.38
10.96
Art Mahaffey
Careerverified
Per 600 PAverified
10.34
17.23
Jack Leiper
Career
Per 600 PA
3
85.71
Art Mahaffey
Careerverified
Per 600 PAverified
60
100
Jack Leiper
Career
Per 600 PA
3
85.71
Art Mahaffey
Careerverified
Per 600 PAverified
52
86.67
Jack Leiper
Career
Per 600 PA
0.143
0.143
Art Mahaffey
Careerverified
Per 600 PAverified
0.161
0.161
Jack Leiper
Career
Per 600 PA
0.143
0.143
Art Mahaffey
Careerverified
Per 600 PAverified
0.192
0.192
Jack Leiper
Career
Per 600 PA
0.286
0.286
Art Mahaffey
Careerverified
Per 600 PAverified
0.352
0.352
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.058
0.058
Jack Leiper
Career
Per 600 PA
0.1
0.1
Art Mahaffey
Careerverified
Per 600 PAverified
0.12
0.12
Jack Leiper
Career
Per 600 PA
0.167
0.167
Art Mahaffey
Careerverified
Per 600 PAverified
0.252
0.252
Jack Leiper
Careerverified
Per 600 PAverified
0.2
0.2
Art Mahaffey
Career
Per 600 PA
0.193
0.193
Jack Leiper
Career
Per 600 PAverified
2
57.14
Art Mahaffey
Careerverified
Per 600 PA
17
28.33
Jack Leiper
Career
Per 600 PAverified
3
85.71
Art Mahaffey
Careerverified
Per 600 PA
19
31.67
Jack Leiper
Career
Per 600 PAverified
5
142.86
Art Mahaffey
Careerverified
Per 600 PA
33
55
Jack Leiper
Career
Per 600 PA
-0.11
-3.09
Art Mahaffey
Careerverified
Per 600 PAverified
1.87
3.12
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
2
3.33
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
8
13.33
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Leiper
Careerverified
Per 600 PAverified
6
171.43
Art Mahaffey
Career
Per 600 PA
109
181.67
Jack Leiper
Careerverified
Per 600 PAverified
3.5
3.5
Art Mahaffey
Career
Per 600 PA
3.3
3.3
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.07
0.07
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
36
60
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
1
1.67
Jack Leiper
Careerverified
Per 600 PAverified
0
0
Art Mahaffey
Career
Per 600 PA
7
11.67
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Leiper
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Leiper
Career
Per 600 PA
Art Mahaffey
Career
Per 600 PA