Dennis Leonard vs. Art Mahaffey — Career Comparison

Dennis Leonard
Baby BoomersNew YorkThrows RightBats RightNorth AmericaKansas City RoyalsAmerican LeagueStarting Pitcher
Art Mahaffey
Silent GenerationOhioThrows RightBats RightNorth AmericaPhiladelphia PhilliesNational LeagueStarting PitcherAll-Star

The numbers give Dennis Leonard a clear advantage over Art Mahaffey across the core pitching metrics. Dennis Leonard led in walk avoidance (BB%+ 118 vs 94), skill-based run prevention (DICE+ 100 vs 90), and run prevention (ERA+ 98 vs 90). Dennis Leonard was the better starter — the numbers make that case clearly.

Pitching Stats for Dennis Leonard and Art Mahaffey

Dennis Leonard
Careerverified
Per 9 Inningsverified
12
12
Art Mahaffey
Career
Per 9 Innings
7
7
Dennis Leonard
Careerverified
Per 9 Innings
312
1.28
Art Mahaffey
Career
Per 9 Inningsverified
185
1.67
Dennis Leonard
Careerverified
Per 9 Innings
302
1.24
Art Mahaffey
Career
Per 9 Inningsverified
148
1.33
Dennis Leonard
Careerverified
Per 9 Inningsverified
144
0.59
Art Mahaffey
Career
Per 9 Innings
59
0.53
Dennis Leonard
Career
Per 9 Inningsverified
106
0.44
Art Mahaffey
Careerverified
Per 9 Innings
64
0.58
Dennis Leonard
Careerverified
Per 9 Inningsverified
57.6
57.6
Art Mahaffey
Career
Per 9 Innings
47.97
47.97
Dennis Leonard
Careerverified
Per 9 Inningsverified
96.79
96.79
Art Mahaffey
Career
Per 9 Innings
80
80
Dennis Leonard
Careerverified
Per 9 Inningsverified
103
0.42
Art Mahaffey
Career
Per 9 Innings
46
0.41
Dennis Leonard
Careerverified
Per 9 Inningsverified
23
0.09
Art Mahaffey
Career
Per 9 Innings
9
0.08
Dennis Leonard
Career
Per 9 Innings
1
0
Art Mahaffey
Career
Per 9 Inningsverified
1
0.01
Dennis Leonard
Career
Per 9 Inningsverified
898
3.7
Art Mahaffey
Careerverified
Per 9 Innings
463
4.17
Dennis Leonard
Careerverified
Per 9 Inningsverified
3.7
3.7
Art Mahaffey
Career
Per 9 Innings
4.17
4.17
Dennis Leonard
Careerverified
Per 9 Inningsverified
3.53
3.53
Art Mahaffey
Career
Per 9 Innings
4.05
4.05
Dennis Leonard
Careerverified
Per 9 Inningsverified
3.92
3.92
Art Mahaffey
Career
Per 9 Innings
4.57
4.57
Dennis Leonard
Career
Per 9 Innings
0.257
0.257
Art Mahaffey
Careerverified
Per 9 Inningsverified
0.249
0.249
Dennis Leonard
Careerverified
Per 9 Innings
6561
27
Art Mahaffey
Career
Per 9 Innings
2997
27
Dennis Leonard
Careerverified
Per 9 Innings
2187
9
Art Mahaffey
Career
Per 9 Innings
999
9
Dennis Leonard
Career
Per 9 Innings
2137
8.79
Art Mahaffey
Careerverified
Per 9 Inningsverified
959
8.64
Dennis Leonard
Career
Per 9 Innings
8.79
8.79
Art Mahaffey
Careerverified
Per 9 Inningsverified
8.64
8.64
Dennis Leonard
Career
Per 9 Inningsverified
202
0.83
Art Mahaffey
Careerverified
Per 9 Innings
125
1.13
Dennis Leonard
Careerverified
Per 9 Inningsverified
0.83
0.83
Art Mahaffey
Career
Per 9 Innings
1.13
1.13
Dennis Leonard
Careerverified
Per 9 Inningsverified
0.65
0.65
Art Mahaffey
Career
Per 9 Innings
0.68
0.68
Dennis Leonard
Career
Per 9 Inningsverified
622
2.56
Art Mahaffey
Careerverified
Per 9 Innings
368
3.32
Dennis Leonard
Career
Per 9 Inningsverified
39
0.16
Art Mahaffey
Careerverified
Per 9 Innings
23
0.21
Dennis Leonard
Careerverified
Per 9 Inningsverified
2.56
2.56
Art Mahaffey
Career
Per 9 Innings
3.32
3.32
Dennis Leonard
Careerverified
Per 9 Innings
1323
5.44
Art Mahaffey
Career
Per 9 Inningsverified
639
5.76
Dennis Leonard
Career
Per 9 Innings
5.44
5.44
Art Mahaffey
Careerverified
Per 9 Inningsverified
5.76
5.76
Dennis Leonard
Careerverified
Per 9 Inningsverified
4.24
4.24
Art Mahaffey
Career
Per 9 Innings
3.45
3.45
Dennis Leonard
Career
Per 9 Innings
0.889
0.889
Art Mahaffey
Careerverified
Per 9 Inningsverified
1.008
1.008
Dennis Leonard
Career
Per 9 Inningsverified
73
0.3
Art Mahaffey
Careerverified
Per 9 Innings
37
0.33
Dennis Leonard
Career
Per 9 Inningsverified
52
0.21
Art Mahaffey
Careerverified
Per 9 Innings
39
0.35
Dennis Leonard
Career
Per 9 Inningsverified
6
0.02
Art Mahaffey
Careerverified
Per 9 Innings
4
0.04
Dennis Leonard
Careerverified
Per 9 Innings
9149
37.65
Art Mahaffey
Career
Per 9 Inningsverified
4252
38.31
Dennis Leonard
Career
Per 9 Innings
3
0.01
Art Mahaffey
Careerverified
Per 9 Inningsverified
10
0.09
Dennis Leonard
Career
Per 9 Inningsverified
1008
4.15
Art Mahaffey
Careerverified
Per 9 Innings
507
4.57
Dennis Leonard
Careerverified
Per 9 Inningsverified
4.15
4.15
Art Mahaffey
Career
Per 9 Innings
4.57
4.57
Dennis Leonard
Career
Per 9 Innings
82
0.34
Art Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Dennis Leonard
Career
Per 9 Innings
65
0.27
Art Mahaffey
Careerverified
Per 9 Inningsverified
0
0
Dennis Leonard
Careerverified
Per 9 Inningsverified
160
0.66
Art Mahaffey
Career
Per 9 Innings
0
0
Dennis Leonard
Careerverified
Per 9 Inningsverified
1.262
1.262
Art Mahaffey
Career
Per 9 Innings
1.328
1.328
Dennis Leonard
Careerverified
Per 9 Innings
8328
34.27
Art Mahaffey
Career
Per 9 Inningsverified
3845
34.64
Dennis Leonard
Career
Per 9 Innings
3.23
3.23
Art Mahaffey
Careerverified
Per 9 Inningsverified
2.74
2.74
Dennis Leonard
Career
Per 9 Innings
0.284
0.284
Art Mahaffey
Careerverified
Per 9 Inningsverified
0.271
0.271
Dennis Leonard
Career
Per 9 Innings
37.65
37.65
Art Mahaffey
Careerverified
Per 9 Inningsverified
38.31
38.31

Fielding Stats for Dennis Leonard and Art Mahaffey

Dennis Leonard
Careerverified
Per 9 Inningsverified
12
12
Art Mahaffey
Career
Per 9 Innings
7
7
Dennis Leonard
Careerverified
Per 9 Innings
312
1.28
Art Mahaffey
Career
Per 9 Inningsverified
185
1.67
Dennis Leonard
Careerverified
Per 9 Innings
302
1.24
Art Mahaffey
Career
Per 9 Inningsverified
148
1.33
Dennis Leonard
Careerverified
Per 9 Innings
6561
27
Art Mahaffey
Career
Per 9 Innings
2997
27
Dennis Leonard
Careerverified
Per 9 Innings
2187
9
Art Mahaffey
Career
Per 9 Innings
999
9
Dennis Leonard
Careerverified
Per 9 Inningsverified
135
0.56
Art Mahaffey
Career
Per 9 Innings
56
0.5
Dennis Leonard
Careerverified
Per 9 Inningsverified
292
1.2
Art Mahaffey
Career
Per 9 Innings
116
1.05
Dennis Leonard
Career
Per 9 Innings
24
0.1
Art Mahaffey
Careerverified
Per 9 Inningsverified
5
0.05
Dennis Leonard
Careerverified
Per 9 Inningsverified
451
1.86
Art Mahaffey
Career
Per 9 Innings
177
1.59
Dennis Leonard
Careerverified
Per 9 Inningsverified
427
1.76
Art Mahaffey
Career
Per 9 Innings
172
1.55
Dennis Leonard
Career
Per 9 Innings
94.68
94.68
Art Mahaffey
Careerverified
Per 9 Inningsverified
97.18
97.18
Dennis Leonard
Careerverified
Per 9 Inningsverified
1.369
1.369
Art Mahaffey
Career
Per 9 Innings
0.93
0.93
Dennis Leonard
Careerverified
Per 9 Inningsverified
96.79
96.79
Art Mahaffey
Career
Per 9 Innings
80
80
Dennis Leonard
Careerverified
Per 9 Inningsverified
28
0.12
Art Mahaffey
Career
Per 9 Innings
5
0.05
Dennis Leonard
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Dennis Leonard
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Dennis Leonard
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0
Dennis Leonard
Career
Per 9 Innings
0
0
Art Mahaffey
Career
Per 9 Innings
0
0

Hitting Stats for Dennis Leonard and Art Mahaffey

Dennis Leonard
Careerverified
Per 600 PA
12
Art Mahaffey
Career
Per 600 PAverified
7
7
Dennis Leonard
Careerverified
Per 600 PA
313
Art Mahaffey
Career
Per 600 PAverified
186
310
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
360
600
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
313
521.67
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.134
0.134
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.428
0.428
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
42
70
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
31
51.67
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
7
11.67
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
1
1.67
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
3
5
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
11
18.33
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.262
0.262
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.01
0.01
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.071
0.071
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
10.34
17.23
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
60
100
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
52
86.67
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.161
0.161
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.192
0.192
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.352
0.352
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.058
0.058
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.12
0.12
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.252
0.252
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.193
0.193
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
17
28.33
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
19
31.67
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
33
55
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
1.87
3.12
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
2
3.33
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
8
13.33
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Career
Per 600 PA
0
0
Dennis Leonard
Careerverified
Per 600 PAverified
0
Art Mahaffey
Career
Per 600 PA
109
181.67
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
3.3
3.3
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Careerverified
Per 600 PAverified
0.07
0.07
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
36
60
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Careerverified
Per 600 PAverified
1
1.67
Dennis Leonard
Careerverified
Per 600 PAverified
0
Art Mahaffey
Career
Per 600 PA
7
11.67
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Career
Per 600 PA
0
0
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Career
Per 600 PA
0
0
Dennis Leonard
Career
Per 600 PA
0
Art Mahaffey
Career
Per 600 PA
0
0
Dennis Leonard
Career
Per 600 PA
Art Mahaffey
Career
Per 600 PA