Jack Armstrong vs. Art Mahaffey — Career Comparison

Jack Armstrong
Gen XNew JerseyThrows RightBats RightNorth AmericaCincinnati RedsNational LeagueStarting PitcherAll-Star
Art Mahaffey
Silent GenerationOhioThrows RightBats RightNorth AmericaPhiladelphia PhilliesNational LeagueStarting PitcherAll-Star

Jack Armstrong and Art Mahaffey are about as close as two starters get — the gap between them is negligible across the key measures. Their run-prevention numbers were nearly identical — ERA+ of 89 for Jack Armstrong and 90 for Art Mahaffey, with skill-based marks of DICE+ 89 and 90 respectively. If forced to pick, Art Mahaffey gets the slight nod, but this is a genuinely even pairing.

Pitching Stats for Jack Armstrong and Art Mahaffey

Jack Armstrong
Career
Per 9 Innings
7
7
Art Mahaffey
Career
Per 9 Innings
7
7
Jack Armstrong
Career
Per 9 Inningsverified
152
1.74
Art Mahaffey
Careerverified
Per 9 Innings
185
1.67
Jack Armstrong
Career
Per 9 Inningsverified
130
1.49
Art Mahaffey
Careerverified
Per 9 Innings
148
1.33
Jack Armstrong
Career
Per 9 Innings
40
0.46
Art Mahaffey
Careerverified
Per 9 Inningsverified
59
0.53
Jack Armstrong
Career
Per 9 Innings
65
0.74
Art Mahaffey
Careerverified
Per 9 Inningsverified
64
0.58
Jack Armstrong
Career
Per 9 Innings
38.1
38.1
Art Mahaffey
Careerverified
Per 9 Inningsverified
47.97
47.97
Jack Armstrong
Careerverified
Per 9 Inningsverified
85.53
85.53
Art Mahaffey
Career
Per 9 Innings
80
80
Jack Armstrong
Career
Per 9 Innings
4
0.05
Art Mahaffey
Careerverified
Per 9 Inningsverified
46
0.41
Jack Armstrong
Career
Per 9 Innings
1
0.01
Art Mahaffey
Careerverified
Per 9 Inningsverified
9
0.08
Jack Armstrong
Career
Per 9 Innings
0
0
Art Mahaffey
Careerverified
Per 9 Inningsverified
1
0.01
Jack Armstrong
Careerverified
Per 9 Innings
400
4.58
Art Mahaffey
Career
Per 9 Inningsverified
463
4.17
Jack Armstrong
Career
Per 9 Innings
4.58
4.58
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.17
4.17
Jack Armstrong
Career
Per 9 Innings
4.48
4.48
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.05
4.05
Jack Armstrong
Career
Per 9 Innings
4.67
4.67
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.57
4.57
Jack Armstrong
Career
Per 9 Innings
0.265
0.265
Art Mahaffey
Careerverified
Per 9 Inningsverified
0.249
0.249
Jack Armstrong
Career
Per 9 Innings
2360
27
Art Mahaffey
Careerverified
Per 9 Innings
2997
27
Jack Armstrong
Career
Per 9 Innings
786.2
9
Art Mahaffey
Careerverified
Per 9 Innings
999
9
Jack Armstrong
Careerverified
Per 9 Innings
807
9.23
Art Mahaffey
Career
Per 9 Inningsverified
959
8.64
Jack Armstrong
Career
Per 9 Innings
9.23
9.23
Art Mahaffey
Careerverified
Per 9 Inningsverified
8.64
8.64
Jack Armstrong
Careerverified
Per 9 Innings
102
1.17
Art Mahaffey
Career
Per 9 Inningsverified
125
1.13
Jack Armstrong
Career
Per 9 Innings
1.17
1.17
Art Mahaffey
Careerverified
Per 9 Inningsverified
1.13
1.13
Jack Armstrong
Careerverified
Per 9 Inningsverified
0.67
0.67
Art Mahaffey
Career
Per 9 Innings
0.68
0.68
Jack Armstrong
Careerverified
Per 9 Innings
319
3.65
Art Mahaffey
Career
Per 9 Inningsverified
368
3.32
Jack Armstrong
Careerverified
Per 9 Innings
21
0.24
Art Mahaffey
Career
Per 9 Inningsverified
23
0.21
Jack Armstrong
Career
Per 9 Innings
3.65
3.65
Art Mahaffey
Careerverified
Per 9 Inningsverified
3.32
3.32
Jack Armstrong
Career
Per 9 Inningsverified
510
5.83
Art Mahaffey
Careerverified
Per 9 Innings
639
5.76
Jack Armstrong
Careerverified
Per 9 Inningsverified
5.83
5.83
Art Mahaffey
Career
Per 9 Innings
5.76
5.76
Jack Armstrong
Career
Per 9 Innings
3.36
3.36
Art Mahaffey
Careerverified
Per 9 Inningsverified
3.45
3.45
Jack Armstrong
Careerverified
Per 9 Inningsverified
1.054
1.054
Art Mahaffey
Career
Per 9 Innings
1.008
1.008
Jack Armstrong
Careerverified
Per 9 Inningsverified
26
0.3
Art Mahaffey
Career
Per 9 Innings
37
0.33
Jack Armstrong
Careerverified
Per 9 Inningsverified
18
0.21
Art Mahaffey
Career
Per 9 Innings
39
0.35
Jack Armstrong
Career
Per 9 Innings
13
0.15
Art Mahaffey
Careerverified
Per 9 Inningsverified
4
0.04
Jack Armstrong
Career
Per 9 Inningsverified
3450
39.47
Art Mahaffey
Careerverified
Per 9 Innings
4252
38.31
Jack Armstrong
Career
Per 9 Inningsverified
10
0.11
Art Mahaffey
Career
Per 9 Innings
10
0.09
Jack Armstrong
Careerverified
Per 9 Innings
439
5.02
Art Mahaffey
Career
Per 9 Inningsverified
507
4.57
Jack Armstrong
Career
Per 9 Innings
5.02
5.02
Art Mahaffey
Careerverified
Per 9 Inningsverified
4.57
4.57
Jack Armstrong
Career
Per 9 Innings
34
0.39
Art Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Innings
35
0.4
Art Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
37
0.42
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
1.431
1.431
Art Mahaffey
Careerverified
Per 9 Inningsverified
1.328
1.328
Jack Armstrong
Career
Per 9 Inningsverified
3044
34.83
Art Mahaffey
Careerverified
Per 9 Innings
3845
34.64
Jack Armstrong
Career
Per 9 Innings
2.89
2.89
Art Mahaffey
Careerverified
Per 9 Inningsverified
2.74
2.74
Jack Armstrong
Career
Per 9 Innings
0.29
0.29
Art Mahaffey
Careerverified
Per 9 Inningsverified
0.271
0.271
Jack Armstrong
Careerverified
Per 9 Inningsverified
39.47
39.47
Art Mahaffey
Career
Per 9 Innings
38.31
38.31

Fielding Stats for Jack Armstrong and Art Mahaffey

Jack Armstrong
Career
Per 9 Innings
7
7
Art Mahaffey
Career
Per 9 Innings
7
7
Jack Armstrong
Career
Per 9 Inningsverified
152
1.74
Art Mahaffey
Careerverified
Per 9 Innings
185
1.67
Jack Armstrong
Career
Per 9 Inningsverified
130
1.49
Art Mahaffey
Careerverified
Per 9 Innings
148
1.33
Jack Armstrong
Career
Per 9 Innings
2360
27
Art Mahaffey
Careerverified
Per 9 Innings
2997
27
Jack Armstrong
Career
Per 9 Innings
786.2
9
Art Mahaffey
Careerverified
Per 9 Innings
999
9
Jack Armstrong
Careerverified
Per 9 Inningsverified
62
0.71
Art Mahaffey
Career
Per 9 Innings
56
0.5
Jack Armstrong
Career
Per 9 Inningsverified
111
1.27
Art Mahaffey
Careerverified
Per 9 Innings
116
1.05
Jack Armstrong
Career
Per 9 Innings
8
0.09
Art Mahaffey
Careerverified
Per 9 Inningsverified
5
0.05
Jack Armstrong
Careerverified
Per 9 Inningsverified
181
2.07
Art Mahaffey
Career
Per 9 Innings
177
1.59
Jack Armstrong
Careerverified
Per 9 Inningsverified
173
1.98
Art Mahaffey
Career
Per 9 Innings
172
1.55
Jack Armstrong
Career
Per 9 Innings
95.58
95.58
Art Mahaffey
Careerverified
Per 9 Inningsverified
97.18
97.18
Jack Armstrong
Careerverified
Per 9 Inningsverified
1.138
1.138
Art Mahaffey
Career
Per 9 Innings
0.93
0.93
Jack Armstrong
Careerverified
Per 9 Inningsverified
85.53
85.53
Art Mahaffey
Career
Per 9 Innings
80
80
Jack Armstrong
Career
Per 9 Inningsverified
5
0.06
Art Mahaffey
Career
Per 9 Innings
5
0.05
Jack Armstrong
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0

Hitting Stats for Jack Armstrong and Art Mahaffey

Jack Armstrong
Career
Per 600 PA
7
7
Art Mahaffey
Career
Per 600 PA
7
7
Jack Armstrong
Career
Per 600 PAverified
153
426.98
Art Mahaffey
Careerverified
Per 600 PA
186
310
Jack Armstrong
Career
Per 600 PA
215
600
Art Mahaffey
Careerverified
Per 600 PA
360
600
Jack Armstrong
Career
Per 600 PA
185
516.28
Art Mahaffey
Careerverified
Per 600 PAverified
313
521.67
Jack Armstrong
Career
Per 600 PA
0.114
0.114
Art Mahaffey
Careerverified
Per 600 PAverified
0.134
0.134
Jack Armstrong
Career
Per 600 PA
0.354
0.354
Art Mahaffey
Careerverified
Per 600 PAverified
0.428
0.428
Jack Armstrong
Career
Per 600 PA
21
58.6
Art Mahaffey
Careerverified
Per 600 PAverified
42
70
Jack Armstrong
Career
Per 600 PAverified
19
53.02
Art Mahaffey
Careerverified
Per 600 PA
31
51.67
Jack Armstrong
Career
Per 600 PA
2
5.58
Art Mahaffey
Careerverified
Per 600 PAverified
7
11.67
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
1
1.67
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
3
5
Jack Armstrong
Career
Per 600 PA
2
5.58
Art Mahaffey
Careerverified
Per 600 PAverified
11
18.33
Jack Armstrong
Career
Per 600 PA
0.095
0.095
Art Mahaffey
Careerverified
Per 600 PAverified
0.262
0.262
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.01
0.01
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
0.071
0.071
Jack Armstrong
Career
Per 600 PA
2.16
6.02
Art Mahaffey
Careerverified
Per 600 PAverified
10.34
17.23
Jack Armstrong
Career
Per 600 PA
23
64.19
Art Mahaffey
Careerverified
Per 600 PAverified
60
100
Jack Armstrong
Career
Per 600 PA
25
69.77
Art Mahaffey
Careerverified
Per 600 PAverified
52
86.67
Jack Armstrong
Career
Per 600 PA
0.132
0.132
Art Mahaffey
Careerverified
Per 600 PAverified
0.161
0.161
Jack Armstrong
Career
Per 600 PA
0.124
0.124
Art Mahaffey
Careerverified
Per 600 PAverified
0.192
0.192
Jack Armstrong
Career
Per 600 PA
0.257
0.257
Art Mahaffey
Careerverified
Per 600 PAverified
0.352
0.352
Jack Armstrong
Career
Per 600 PA
0.011
0.011
Art Mahaffey
Careerverified
Per 600 PAverified
0.058
0.058
Jack Armstrong
Career
Per 600 PA
0.091
0.091
Art Mahaffey
Careerverified
Per 600 PAverified
0.12
0.12
Jack Armstrong
Career
Per 600 PA
0.159
0.159
Art Mahaffey
Careerverified
Per 600 PAverified
0.252
0.252
Jack Armstrong
Careerverified
Per 600 PAverified
0.206
0.206
Art Mahaffey
Career
Per 600 PA
0.193
0.193
Jack Armstrong
Career
Per 600 PA
8
22.33
Art Mahaffey
Careerverified
Per 600 PAverified
17
28.33
Jack Armstrong
Career
Per 600 PA
8
22.33
Art Mahaffey
Careerverified
Per 600 PAverified
19
31.67
Jack Armstrong
Career
Per 600 PA
16
44.65
Art Mahaffey
Careerverified
Per 600 PAverified
33
55
Jack Armstrong
Career
Per 600 PA
-4.73
-13.19
Art Mahaffey
Careerverified
Per 600 PAverified
1.87
3.12
Jack Armstrong
Career
Per 600 PAverified
2
5.58
Art Mahaffey
Career
Per 600 PA
2
3.33
Jack Armstrong
Career
Per 600 PA
2
5.58
Art Mahaffey
Careerverified
Per 600 PAverified
8
13.33
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Armstrong
Careerverified
Per 600 PA
83
231.63
Art Mahaffey
Career
Per 600 PAverified
109
181.67
Jack Armstrong
Career
Per 600 PA
2.59
2.59
Art Mahaffey
Careerverified
Per 600 PAverified
3.3
3.3
Jack Armstrong
Career
Per 600 PA
0.02
0.02
Art Mahaffey
Careerverified
Per 600 PAverified
0.07
0.07
Jack Armstrong
Career
Per 600 PAverified
26
72.56
Art Mahaffey
Careerverified
Per 600 PA
36
60
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Careerverified
Per 600 PAverified
1
1.67
Jack Armstrong
Careerverified
Per 600 PA
6
16.74
Art Mahaffey
Career
Per 600 PAverified
7
11.67
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Armstrong
Career
Per 600 PA
0
0
Art Mahaffey
Career
Per 600 PA
0
0
Jack Armstrong
Career
Per 600 PA
Art Mahaffey
Career
Per 600 PA