Willard Mains vs. Sean O'Sullivan — Career Comparison

Willard Mains
Pre-GenerationalMaineThrows RightBats LeftNorth AmericaCincinnati Kelly's KillersAmerican AssociationRelief Pitcher
Sean O'Sullivan
MillenialCaliforniaThrows RightBats RightNorth AmericaKansas City RoyalsAmerican LeagueStarting Pitcher

Sean O'Sullivan built a career as a starting pitcher and Willard Mains as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Willard Mains posted stronger surface numbers — ERA 3.53 and WHIP 1.550 compared to 6.01 and 1.616 for Sean O'Sullivan. By the career numbers, Willard Mains had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Willard Mains and Sean O'Sullivan

Willard Mains
Career
Per 9 Innings
3
3
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
7
7
Willard Mains
Career
Per 9 Innings
42
1.41
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
71
1.97
Willard Mains
Career
Per 9 Innings
32
1.08
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
56
1.56
Willard Mains
Careerverified
Per 9 Inningsverified
16
0.54
Sean O'Sullivan
Career
Per 9 Innings
13
0.36
Willard Mains
Careerverified
Per 9 Inningsverified
17
0.57
Sean O'Sullivan
Career
Per 9 Innings
23
0.64
Willard Mains
Careerverified
Per 9 Inningsverified
48.48
48.48
Sean O'Sullivan
Career
Per 9 Innings
36.11
36.11
Willard Mains
Career
Per 9 Innings
76.19
76.19
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
78.87
78.87
Willard Mains
Careerverified
Per 9 Inningsverified
24
0.81
Sean O'Sullivan
Career
Per 9 Innings
0
0
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Willard Mains
Careerverified
Per 9 Inningsverified
1
0.03
Sean O'Sullivan
Career
Per 9 Innings
0
0
Willard Mains
Careerverified
Per 9 Inningsverified
105
3.53
Sean O'Sullivan
Career
Per 9 Innings
216
6.01
Willard Mains
Careerverified
Per 9 Inningsverified
3.53
3.53
Sean O'Sullivan
Career
Per 9 Innings
6.01
6.01
Willard Mains
Careerverified
Per 9 Inningsverified
4.17
4.17
Sean O'Sullivan
Career
Per 9 Innings
5.98
5.98
Willard Mains
Careerverified
Per 9 Inningsverified
4.42
4.42
Sean O'Sullivan
Career
Per 9 Innings
5.58
5.58
Willard Mains
Careerverified
Per 9 Inningsverified
0.249
0.249
Sean O'Sullivan
Career
Per 9 Innings
0.305
0.305
Willard Mains
Career
Per 9 Innings
803
27
Sean O'Sullivan
Careerverified
Per 9 Innings
971
27
Willard Mains
Career
Per 9 Innings
267.2
9
Sean O'Sullivan
Careerverified
Per 9 Innings
323.2
9
Willard Mains
Careerverified
Per 9 Inningsverified
261
8.78
Sean O'Sullivan
Career
Per 9 Innings
398
11.07
Willard Mains
Careerverified
Per 9 Inningsverified
8.78
8.78
Sean O'Sullivan
Career
Per 9 Innings
11.07
11.07
Willard Mains
Careerverified
Per 9 Inningsverified
5
0.17
Sean O'Sullivan
Career
Per 9 Innings
59
1.64
Willard Mains
Careerverified
Per 9 Inningsverified
0.17
0.17
Sean O'Sullivan
Career
Per 9 Innings
1.64
1.64
Willard Mains
Careerverified
Per 9 Inningsverified
0.12
0.12
Sean O'Sullivan
Career
Per 9 Innings
0.83
0.83
Willard Mains
Career
Per 9 Innings
154
5.18
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
115
3.2
Willard Mains
Careerverified
Per 9 Inningsverified
0
0
Sean O'Sullivan
Career
Per 9 Innings
10
0.28
Willard Mains
Career
Per 9 Innings
5.18
5.18
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
3.2
3.2
Willard Mains
Career
Per 9 Innings
96
3.23
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
158
4.39
Willard Mains
Career
Per 9 Innings
3.23
3.23
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
4.39
4.39
Willard Mains
Careerverified
Per 9 Inningsverified
2.29
2.29
Sean O'Sullivan
Career
Per 9 Innings
2.23
2.23
Willard Mains
Careerverified
Per 9 Inningsverified
0.934
0.934
Sean O'Sullivan
Career
Per 9 Innings
0.844
0.844
Willard Mains
Career
Per 9 Innings
17
0.57
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
13
0.36
Willard Mains
Career
Per 9 Innings
15
0.5
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
13
0.36
Willard Mains
Careerverified
Per 9 Inningsverified
0
0
Sean O'Sullivan
Career
Per 9 Innings
2
0.06
Willard Mains
Career
Per 9 Inningsverified
1219
40.99
Sean O'Sullivan
Careerverified
Per 9 Innings
1464
40.71
Willard Mains
Career
Per 9 Inningsverified
9
0.3
Sean O'Sullivan
Career
Per 9 Innings
9
0.25
Willard Mains
Careerverified
Per 9 Innings
191
6.42
Sean O'Sullivan
Career
Per 9 Inningsverified
226
6.28
Willard Mains
Career
Per 9 Innings
6.42
6.42
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
6.28
6.28
Willard Mains
Careerverified
Per 9 Inningsverified
0
0
Sean O'Sullivan
Career
Per 9 Innings
11
0.31
Willard Mains
Careerverified
Per 9 Inningsverified
0
0
Sean O'Sullivan
Career
Per 9 Innings
19
0.53
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
32
0.89
Willard Mains
Careerverified
Per 9 Inningsverified
1.55
1.55
Sean O'Sullivan
Career
Per 9 Innings
1.585
1.585
Willard Mains
Career
Per 9 Innings
1050
35.31
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
1306
36.32
Willard Mains
Career
Per 9 Innings
4.55
4.55
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
3.18
3.18
Willard Mains
Careerverified
Per 9 Inningsverified
0.27
0.27
Sean O'Sullivan
Career
Per 9 Innings
0.311
0.311
Willard Mains
Careerverified
Per 9 Inningsverified
40.99
40.99
Sean O'Sullivan
Career
Per 9 Innings
40.71
40.71

Fielding Stats for Willard Mains and Sean O'Sullivan

Willard Mains
Career
Per 9 Innings
3
3
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
7
7
Willard Mains
Career
Per 9 Innings
44
1.43
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
71
1.97
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
56
1.56
Willard Mains
Career
Per 9 Innings
828
27
Sean O'Sullivan
Careerverified
Per 9 Innings
971
27
Willard Mains
Career
Per 9 Innings
276
9
Sean O'Sullivan
Careerverified
Per 9 Innings
323.2
9
Willard Mains
Career
Per 9 Innings
6
0.2
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
22
0.61
Willard Mains
Careerverified
Per 9 Inningsverified
81
2.64
Sean O'Sullivan
Career
Per 9 Innings
31
0.86
Willard Mains
Career
Per 9 Innings
8
0.26
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
3
0.08
Willard Mains
Careerverified
Per 9 Inningsverified
95
3.1
Sean O'Sullivan
Career
Per 9 Innings
56
1.56
Willard Mains
Careerverified
Per 9 Inningsverified
87
2.84
Sean O'Sullivan
Career
Per 9 Innings
53
1.47
Willard Mains
Career
Per 9 Innings
91.58
91.58
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
94.64
94.64
Willard Mains
Careerverified
Per 9 Inningsverified
1.977
1.977
Sean O'Sullivan
Career
Per 9 Innings
0.747
0.747
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
78.87
78.87
Willard Mains
Career
Per 9 Innings
1
0.03
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
2
0.06
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Willard Mains
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0

Hitting Stats for Willard Mains and Sean O'Sullivan

Willard Mains
Career
Per 600 PA
3
3
Sean O'Sullivan
Careerverified
Per 600 PAverified
7
7
Willard Mains
Career
Per 600 PA
45
207.69
Sean O'Sullivan
Careerverified
Per 600 PAverified
71
1183.33
Willard Mains
Careerverified
Per 600 PA
130
600
Sean O'Sullivan
Career
Per 600 PA
36
600
Willard Mains
Careerverified
Per 600 PAverified
124
572.31
Sean O'Sullivan
Career
Per 600 PA
33
550
Willard Mains
Careerverified
Per 600 PAverified
0.258
0.258
Sean O'Sullivan
Career
Per 600 PA
0.121
0.121
Willard Mains
Careerverified
Per 600 PAverified
0.658
0.658
Sean O'Sullivan
Career
Per 600 PA
0.375
0.375
Willard Mains
Careerverified
Per 600 PAverified
32
147.69
Sean O'Sullivan
Career
Per 600 PA
4
66.67
Willard Mains
Careerverified
Per 600 PAverified
25
115.38
Sean O'Sullivan
Career
Per 600 PA
2
33.33
Willard Mains
Careerverified
Per 600 PA
4
18.46
Sean O'Sullivan
Career
Per 600 PAverified
2
33.33
Willard Mains
Careerverified
Per 600 PAverified
2
9.23
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
1
4.62
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PA
7
32.31
Sean O'Sullivan
Career
Per 600 PAverified
2
33.33
Willard Mains
Career
Per 600 PA
0.219
0.219
Sean O'Sullivan
Careerverified
Per 600 PAverified
0.5
0.5
Willard Mains
Careerverified
Per 600 PAverified
0.008
0.008
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
0.031
0.031
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
13.05
60.24
Sean O'Sullivan
Career
Per 600 PA
0.94
15.66
Willard Mains
Careerverified
Per 600 PAverified
43
198.46
Sean O'Sullivan
Career
Per 600 PA
6
100
Willard Mains
Careerverified
Per 600 PAverified
38
175.38
Sean O'Sullivan
Career
Per 600 PA
5
83.33
Willard Mains
Careerverified
Per 600 PAverified
0.292
0.292
Sean O'Sullivan
Career
Per 600 PA
0.147
0.147
Willard Mains
Careerverified
Per 600 PAverified
0.347
0.347
Sean O'Sullivan
Career
Per 600 PA
0.182
0.182
Willard Mains
Careerverified
Per 600 PAverified
0.639
0.639
Sean O'Sullivan
Career
Per 600 PA
0.329
0.329
Willard Mains
Careerverified
Per 600 PAverified
0.089
0.089
Sean O'Sullivan
Career
Per 600 PA
0.061
0.061
Willard Mains
Careerverified
Per 600 PAverified
0.218
0.218
Sean O'Sullivan
Career
Per 600 PA
0.112
0.112
Willard Mains
Careerverified
Per 600 PAverified
0.554
0.554
Sean O'Sullivan
Career
Per 600 PA
0.241
0.241
Willard Mains
Careerverified
Per 600 PAverified
0.284
0.284
Sean O'Sullivan
Career
Per 600 PA
0.25
0.25
Willard Mains
Careerverified
Per 600 PAverified
17
78.46
Sean O'Sullivan
Career
Per 600 PA
3
50
Willard Mains
Careerverified
Per 600 PAverified
15
69.23
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
31
143.08
Sean O'Sullivan
Career
Per 600 PA
3
50
Willard Mains
Careerverified
Per 600 PAverified
14.61
67.42
Sean O'Sullivan
Career
Per 600 PA
-0.11
-1.78
Willard Mains
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
6
27.69
Sean O'Sullivan
Career
Per 600 PA
1
16.67
Willard Mains
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
14
64.62
Sean O'Sullivan
Career
Per 600 PA
17
283.33
Willard Mains
Careerverified
Per 600 PAverified
9.29
9.29
Sean O'Sullivan
Career
Per 600 PA
2.12
2.12
Willard Mains
Careerverified
Per 600 PAverified
0.43
0.43
Sean O'Sullivan
Career
Per 600 PA
0.06
0.06
Willard Mains
Career
Per 600 PA
0
0
Sean O'Sullivan
Careerverified
Per 600 PAverified
2
33.33
Willard Mains
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
2
9.23
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
2
9.23
Sean O'Sullivan
Career
Per 600 PA
0
0
Willard Mains
Careerverified
Per 600 PAverified
100
100
Sean O'Sullivan
Career
Per 600 PA