Sean O'Sullivan vs. Ken Tatum — Career Comparison

Sean O'Sullivan
MillenialCaliforniaThrows RightBats RightNorth AmericaKansas City RoyalsAmerican LeagueStarting Pitcher
Ken Tatum
Silent GenerationLouisianaThrows RightBats RightNorth AmericaCalifornia AngelsAmerican LeagueRelief Pitcher

Sean O'Sullivan built a career as a starting pitcher and Ken Tatum as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Ken Tatum posted stronger surface numbers — ERA 2.93 and WHIP 1.298 compared to 6.01 and 1.616 for Sean O'Sullivan. By the career numbers, Ken Tatum had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Sean O'Sullivan and Ken Tatum

Sean O'Sullivan
Careerverified
Per 9 Inningsverified
7
7
Ken Tatum
Career
Per 9 Innings
6
6
Sean O'Sullivan
Career
Per 9 Innings
71
1.97
Ken Tatum
Careerverified
Per 9 Inningsverified
176
5.6
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
56
1.56
Ken Tatum
Career
Per 9 Innings
2
0.06
Sean O'Sullivan
Career
Per 9 Innings
13
0.36
Ken Tatum
Careerverified
Per 9 Inningsverified
16
0.51
Sean O'Sullivan
Career
Per 9 Innings
23
0.64
Ken Tatum
Careerverified
Per 9 Inningsverified
12
0.38
Sean O'Sullivan
Career
Per 9 Innings
36.11
36.11
Ken Tatum
Careerverified
Per 9 Inningsverified
57.14
57.14
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
78.87
78.87
Ken Tatum
Career
Per 9 Innings
1.14
1.14
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Careerverified
Per 9 Inningsverified
52
1.66
Sean O'Sullivan
Career
Per 9 Innings
216
6.01
Ken Tatum
Careerverified
Per 9 Inningsverified
92
2.93
Sean O'Sullivan
Career
Per 9 Innings
6.01
6.01
Ken Tatum
Careerverified
Per 9 Inningsverified
2.93
2.93
Sean O'Sullivan
Career
Per 9 Innings
5.98
5.98
Ken Tatum
Careerverified
Per 9 Inningsverified
3.18
3.18
Sean O'Sullivan
Career
Per 9 Innings
5.58
5.58
Ken Tatum
Careerverified
Per 9 Inningsverified
4.44
4.44
Sean O'Sullivan
Career
Per 9 Innings
0.305
0.305
Ken Tatum
Careerverified
Per 9 Inningsverified
0.223
0.223
Sean O'Sullivan
Careerverified
Per 9 Innings
971
27
Ken Tatum
Career
Per 9 Innings
848
27
Sean O'Sullivan
Careerverified
Per 9 Innings
323.2
9
Ken Tatum
Career
Per 9 Innings
282.2
9
Sean O'Sullivan
Career
Per 9 Innings
398
11.07
Ken Tatum
Careerverified
Per 9 Inningsverified
230
7.32
Sean O'Sullivan
Career
Per 9 Innings
11.07
11.07
Ken Tatum
Careerverified
Per 9 Inningsverified
7.32
7.32
Sean O'Sullivan
Career
Per 9 Innings
59
1.64
Ken Tatum
Careerverified
Per 9 Inningsverified
24
0.76
Sean O'Sullivan
Career
Per 9 Innings
1.64
1.64
Ken Tatum
Careerverified
Per 9 Inningsverified
0.76
0.76
Sean O'Sullivan
Career
Per 9 Innings
0.83
0.83
Ken Tatum
Careerverified
Per 9 Inningsverified
0.14
0.14
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
115
3.2
Ken Tatum
Career
Per 9 Innings
117
3.73
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
10
0.28
Ken Tatum
Career
Per 9 Innings
20
0.64
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
3.2
3.2
Ken Tatum
Career
Per 9 Innings
3.73
3.73
Sean O'Sullivan
Careerverified
Per 9 Innings
158
4.39
Ken Tatum
Career
Per 9 Inningsverified
156
4.97
Sean O'Sullivan
Career
Per 9 Innings
4.39
4.39
Ken Tatum
Careerverified
Per 9 Inningsverified
4.97
4.97
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
2.23
2.23
Ken Tatum
Career
Per 9 Innings
0.89
0.89
Sean O'Sullivan
Career
Per 9 Innings
0.844
0.844
Ken Tatum
Careerverified
Per 9 Inningsverified
0.966
0.966
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
13
0.36
Ken Tatum
Career
Per 9 Innings
18
0.57
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
13
0.36
Ken Tatum
Career
Per 9 Innings
19
0.6
Sean O'Sullivan
Career
Per 9 Innings
2
0.06
Ken Tatum
Careerverified
Per 9 Inningsverified
0
0
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
1464
40.71
Ken Tatum
Career
Per 9 Innings
1186
37.76
Sean O'Sullivan
Career
Per 9 Innings
9
0.25
Ken Tatum
Careerverified
Per 9 Inningsverified
105
3.34
Sean O'Sullivan
Career
Per 9 Innings
226
6.28
Ken Tatum
Careerverified
Per 9 Inningsverified
103
3.28
Sean O'Sullivan
Career
Per 9 Innings
6.28
6.28
Ken Tatum
Careerverified
Per 9 Inningsverified
3.28
3.28
Sean O'Sullivan
Career
Per 9 Inningsverified
11
0.31
Ken Tatum
Careerverified
Per 9 Innings
10
0.32
Sean O'Sullivan
Career
Per 9 Innings
19
0.53
Ken Tatum
Careerverified
Per 9 Inningsverified
8
0.25
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
32
0.89
Ken Tatum
Career
Per 9 Innings
5
0.16
Sean O'Sullivan
Career
Per 9 Innings
1.585
1.585
Ken Tatum
Careerverified
Per 9 Inningsverified
1.228
1.228
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
1306
36.32
Ken Tatum
Career
Per 9 Innings
1032
32.86
Sean O'Sullivan
Career
Per 9 Innings
3.18
3.18
Ken Tatum
Careerverified
Per 9 Inningsverified
0.59
0.59
Sean O'Sullivan
Career
Per 9 Innings
0.311
0.311
Ken Tatum
Careerverified
Per 9 Inningsverified
0.242
0.242
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
40.71
40.71
Ken Tatum
Career
Per 9 Innings
37.76
37.76

Fielding Stats for Sean O'Sullivan and Ken Tatum

Sean O'Sullivan
Careerverified
Per 9 Inningsverified
7
7
Ken Tatum
Career
Per 9 Innings
6
6
Sean O'Sullivan
Career
Per 9 Innings
71
1.97
Ken Tatum
Careerverified
Per 9 Inningsverified
176
5.6
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
56
1.56
Ken Tatum
Career
Per 9 Innings
2
0.06
Sean O'Sullivan
Careerverified
Per 9 Innings
971
27
Ken Tatum
Career
Per 9 Innings
849
27
Sean O'Sullivan
Careerverified
Per 9 Innings
323.2
9
Ken Tatum
Career
Per 9 Innings
283
9
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
22
0.61
Ken Tatum
Career
Per 9 Innings
10
0.32
Sean O'Sullivan
Career
Per 9 Innings
31
0.86
Ken Tatum
Careerverified
Per 9 Inningsverified
47
1.49
Sean O'Sullivan
Career
Per 9 Innings
3
0.08
Ken Tatum
Careerverified
Per 9 Inningsverified
2
0.06
Sean O'Sullivan
Career
Per 9 Innings
56
1.56
Ken Tatum
Careerverified
Per 9 Inningsverified
59
1.88
Sean O'Sullivan
Career
Per 9 Innings
53
1.47
Ken Tatum
Careerverified
Per 9 Inningsverified
57
1.81
Sean O'Sullivan
Career
Per 9 Innings
94.64
94.64
Ken Tatum
Careerverified
Per 9 Inningsverified
96.61
96.61
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
0.747
0.747
Ken Tatum
Career
Per 9 Innings
0.324
0.324
Sean O'Sullivan
Careerverified
Per 9 Inningsverified
78.87
78.87
Ken Tatum
Career
Per 9 Innings
1.14
1.14
Sean O'Sullivan
Career
Per 9 Innings
2
0.06
Ken Tatum
Careerverified
Per 9 Inningsverified
3
0.1
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Career
Per 9 Innings
0
0
Sean O'Sullivan
Career
Per 9 Innings
0
0
Ken Tatum
Career
Per 9 Innings
0
0

Hitting Stats for Sean O'Sullivan and Ken Tatum

Sean O'Sullivan
Careerverified
Per 600 PAverified
7
7
Ken Tatum
Career
Per 600 PA
6
6
Sean O'Sullivan
Career
Per 600 PA
71
1183.33
Ken Tatum
Careerverified
Per 600 PAverified
176
2070.59
Sean O'Sullivan
Career
Per 600 PA
36
600
Ken Tatum
Careerverified
Per 600 PA
51
600
Sean O'Sullivan
Career
Per 600 PAverified
33
550
Ken Tatum
Careerverified
Per 600 PA
45
529.41
Sean O'Sullivan
Career
Per 600 PA
0.121
0.121
Ken Tatum
Careerverified
Per 600 PAverified
0.244
0.244
Sean O'Sullivan
Career
Per 600 PA
0.375
0.375
Ken Tatum
Careerverified
Per 600 PAverified
0.843
0.843
Sean O'Sullivan
Career
Per 600 PA
4
66.67
Ken Tatum
Careerverified
Per 600 PAverified
11
129.41
Sean O'Sullivan
Career
Per 600 PA
2
33.33
Ken Tatum
Careerverified
Per 600 PAverified
6
70.59
Sean O'Sullivan
Careerverified
Per 600 PAverified
2
33.33
Ken Tatum
Career
Per 600 PA
1
11.76
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Careerverified
Per 600 PAverified
4
47.06
Sean O'Sullivan
Career
Per 600 PA
2
33.33
Ken Tatum
Careerverified
Per 600 PAverified
5
58.82
Sean O'Sullivan
Careerverified
Per 600 PAverified
0.5
0.5
Ken Tatum
Career
Per 600 PA
0.455
0.455
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Careerverified
Per 600 PAverified
0.089
0.089
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Careerverified
Per 600 PAverified
0.364
0.364
Sean O'Sullivan
Career
Per 600 PA
0.94
15.66
Ken Tatum
Careerverified
Per 600 PAverified
7.66
90.09
Sean O'Sullivan
Career
Per 600 PA
6
100
Ken Tatum
Careerverified
Per 600 PAverified
24
282.35
Sean O'Sullivan
Career
Per 600 PA
5
83.33
Ken Tatum
Careerverified
Per 600 PAverified
15
176.47
Sean O'Sullivan
Career
Per 600 PA
0.147
0.147
Ken Tatum
Careerverified
Per 600 PAverified
0.306
0.306
Sean O'Sullivan
Career
Per 600 PA
0.182
0.182
Ken Tatum
Careerverified
Per 600 PAverified
0.533
0.533
Sean O'Sullivan
Career
Per 600 PA
0.329
0.329
Ken Tatum
Careerverified
Per 600 PAverified
0.839
0.839
Sean O'Sullivan
Career
Per 600 PA
0.061
0.061
Ken Tatum
Careerverified
Per 600 PAverified
0.289
0.289
Sean O'Sullivan
Career
Per 600 PA
0.112
0.112
Ken Tatum
Careerverified
Per 600 PAverified
0.271
0.271
Sean O'Sullivan
Career
Per 600 PA
0.241
0.241
Ken Tatum
Careerverified
Per 600 PAverified
0.824
0.824
Sean O'Sullivan
Career
Per 600 PA
0.25
0.25
Ken Tatum
Careerverified
Per 600 PAverified
0.292
0.292
Sean O'Sullivan
Career
Per 600 PA
3
50
Ken Tatum
Careerverified
Per 600 PAverified
7
82.35
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Careerverified
Per 600 PAverified
6
70.59
Sean O'Sullivan
Career
Per 600 PA
3
50
Ken Tatum
Careerverified
Per 600 PAverified
9
105.88
Sean O'Sullivan
Career
Per 600 PA
-0.11
-1.78
Ken Tatum
Careerverified
Per 600 PAverified
7.56
88.89
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Careerverified
Per 600 PAverified
1
11.76
Sean O'Sullivan
Career
Per 600 PA
1
16.67
Ken Tatum
Careerverified
Per 600 PAverified
3
35.29
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
17
283.33
Ken Tatum
Career
Per 600 PAverified
17
200
Sean O'Sullivan
Career
Per 600 PA
2.12
2.12
Ken Tatum
Careerverified
Per 600 PAverified
3
3
Sean O'Sullivan
Career
Per 600 PA
0.06
0.06
Ken Tatum
Careerverified
Per 600 PAverified
0.18
0.18
Sean O'Sullivan
Career
Per 600 PAverified
2
33.33
Ken Tatum
Career
Per 600 PA
2
23.53
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
0
0
Ken Tatum
Career
Per 600 PA
0
0
Sean O'Sullivan
Career
Per 600 PA
Ken Tatum
Career
Per 600 PA