Jack Aker vs. Mike O'Connor — Career Comparison

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Mike O'Connor
Gen XTexasThrows LeftBats LeftNorth AmericaWashington NationalsNational LeagueStarting Pitcher

Mike O'Connor built a career as a starting pitcher and Jack Aker as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Aker posted stronger surface numbers — ERA 3.28 and WHIP 1.369 compared to 5.3 and 1.459 for Mike O'Connor. By the career numbers, Jack Aker had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Jack Aker and Mike O'Connor

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Mike O'Connor
Career
Per 9 Innings
3
3
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Mike O'Connor
Career
Per 9 Innings
35
2.61
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Careerverified
Per 9 Inningsverified
21
1.57
Jack Aker
Careerverified
Per 9 Inningsverified
47
0.57
Mike O'Connor
Career
Per 9 Innings
4
0.3
Jack Aker
Career
Per 9 Inningsverified
45
0.54
Mike O'Connor
Careerverified
Per 9 Innings
10
0.75
Jack Aker
Careerverified
Per 9 Inningsverified
51.09
51.09
Mike O'Connor
Career
Per 9 Innings
28.57
28.57
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Careerverified
Per 9 Inningsverified
60
60
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Inningsverified
272
3.28
Mike O'Connor
Careerverified
Per 9 Innings
71
5.3
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Mike O'Connor
Career
Per 9 Innings
5.3
5.3
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Mike O'Connor
Career
Per 9 Innings
4.55
4.55
Jack Aker
Careerverified
Per 9 Inningsverified
4.29
4.29
Mike O'Connor
Career
Per 9 Innings
5.43
5.43
Jack Aker
Careerverified
Per 9 Inningsverified
0.244
0.244
Mike O'Connor
Career
Per 9 Innings
0.248
0.248
Jack Aker
Careerverified
Per 9 Innings
2238
27
Mike O'Connor
Career
Per 9 Innings
362
27
Jack Aker
Careerverified
Per 9 Innings
746
9
Mike O'Connor
Career
Per 9 Innings
120.2
9
Jack Aker
Career
Per 9 Inningsverified
679
8.19
Mike O'Connor
Careerverified
Per 9 Innings
112
8.35
Jack Aker
Careerverified
Per 9 Inningsverified
8.19
8.19
Mike O'Connor
Career
Per 9 Innings
8.35
8.35
Jack Aker
Career
Per 9 Inningsverified
64
0.77
Mike O'Connor
Careerverified
Per 9 Innings
18
1.34
Jack Aker
Careerverified
Per 9 Inningsverified
0.77
0.77
Mike O'Connor
Career
Per 9 Innings
1.34
1.34
Jack Aker
Careerverified
Per 9 Inningsverified
0.13
0.13
Mike O'Connor
Career
Per 9 Innings
0.51
0.51
Jack Aker
Career
Per 9 Inningsverified
274
3.31
Mike O'Connor
Careerverified
Per 9 Innings
59
4.4
Jack Aker
Career
Per 9 Innings
68
0.82
Mike O'Connor
Careerverified
Per 9 Inningsverified
5
0.37
Jack Aker
Careerverified
Per 9 Inningsverified
3.31
3.31
Mike O'Connor
Career
Per 9 Innings
4.4
4.4
Jack Aker
Careerverified
Per 9 Innings
404
4.87
Mike O'Connor
Career
Per 9 Inningsverified
71
5.3
Jack Aker
Career
Per 9 Innings
4.87
4.87
Mike O'Connor
Careerverified
Per 9 Inningsverified
5.3
5.3
Jack Aker
Career
Per 9 Innings
0.82
0.82
Mike O'Connor
Careerverified
Per 9 Inningsverified
2.03
2.03
Jack Aker
Career
Per 9 Innings
0.909
0.909
Mike O'Connor
Careerverified
Per 9 Inningsverified
1.077
1.077
Jack Aker
Career
Per 9 Inningsverified
13
0.16
Mike O'Connor
Careerverified
Per 9 Innings
10
0.75
Jack Aker
Career
Per 9 Inningsverified
40
0.48
Mike O'Connor
Careerverified
Per 9 Innings
8
0.6
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Innings
3144
37.93
Mike O'Connor
Career
Per 9 Inningsverified
532
39.68
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Mike O'Connor
Career
Per 9 Innings
2
0.15
Jack Aker
Career
Per 9 Inningsverified
312
3.76
Mike O'Connor
Careerverified
Per 9 Innings
76
5.67
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Mike O'Connor
Career
Per 9 Innings
5.67
5.67
Jack Aker
Career
Per 9 Inningsverified
32
0.39
Mike O'Connor
Careerverified
Per 9 Innings
8
0.6
Jack Aker
Career
Per 9 Inningsverified
12
0.14
Mike O'Connor
Careerverified
Per 9 Innings
5
0.37
Jack Aker
Careerverified
Per 9 Innings
19
0.23
Mike O'Connor
Career
Per 9 Inningsverified
9
0.67
Jack Aker
Careerverified
Per 9 Inningsverified
1.278
1.278
Mike O'Connor
Career
Per 9 Innings
1.417
1.417
Jack Aker
Careerverified
Per 9 Innings
2786
33.61
Mike O'Connor
Career
Per 9 Inningsverified
452
33.71
Jack Aker
Careerverified
Per 9 Inningsverified
0.63
0.63
Mike O'Connor
Career
Per 9 Innings
2.17
2.17
Jack Aker
Career
Per 9 Innings
0.265
0.265
Mike O'Connor
Careerverified
Per 9 Inningsverified
0.259
0.259
Jack Aker
Career
Per 9 Innings
37.93
37.93
Mike O'Connor
Careerverified
Per 9 Inningsverified
39.68
39.68

Fielding Stats for Jack Aker and Mike O'Connor

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Mike O'Connor
Career
Per 9 Innings
3
3
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Mike O'Connor
Career
Per 9 Innings
35
2.61
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Careerverified
Per 9 Inningsverified
21
1.57
Jack Aker
Careerverified
Per 9 Innings
2240
27
Mike O'Connor
Career
Per 9 Innings
362
27
Jack Aker
Careerverified
Per 9 Innings
746.2
9
Mike O'Connor
Career
Per 9 Innings
120.2
9
Jack Aker
Careerverified
Per 9 Inningsverified
65
0.78
Mike O'Connor
Career
Per 9 Innings
4
0.3
Jack Aker
Careerverified
Per 9 Inningsverified
167
2.01
Mike O'Connor
Career
Per 9 Innings
10
0.75
Jack Aker
Career
Per 9 Innings
8
0.1
Mike O'Connor
Careerverified
Per 9 Inningsverified
1
0.07
Jack Aker
Careerverified
Per 9 Inningsverified
240
2.89
Mike O'Connor
Career
Per 9 Innings
15
1.12
Jack Aker
Careerverified
Per 9 Inningsverified
232
2.8
Mike O'Connor
Career
Per 9 Innings
14
1.04
Jack Aker
Careerverified
Per 9 Inningsverified
96.67
96.67
Mike O'Connor
Career
Per 9 Innings
93.33
93.33
Jack Aker
Careerverified
Per 9 Inningsverified
0.469
0.469
Mike O'Connor
Career
Per 9 Innings
0.4
0.4
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Careerverified
Per 9 Inningsverified
60
60
Jack Aker
Careerverified
Per 9 Inningsverified
20
0.24
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Mike O'Connor
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Mike O'Connor

Jack Aker
Careerverified
Per 600 PAverified
11
11
Mike O'Connor
Career
Per 600 PA
3
3
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Mike O'Connor
Career
Per 600 PA
35
600
Jack Aker
Careerverified
Per 600 PA
104
600
Mike O'Connor
Career
Per 600 PA
35
600
Jack Aker
Careerverified
Per 600 PA
92
530.77
Mike O'Connor
Career
Per 600 PAverified
33
565.71
Jack Aker
Careerverified
Per 600 PAverified
0.076
0.076
Mike O'Connor
Career
Per 600 PA
0.061
0.061
Jack Aker
Careerverified
Per 600 PAverified
0.279
0.279
Mike O'Connor
Career
Per 600 PA
0.186
0.186
Jack Aker
Careerverified
Per 600 PAverified
7
40.38
Mike O'Connor
Career
Per 600 PA
2
34.29
Jack Aker
Careerverified
Per 600 PA
5
28.85
Mike O'Connor
Career
Per 600 PAverified
2
34.29
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
0.286
0.286
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
0.81
4.66
Mike O'Connor
Career
Per 600 PA
0.17
2.93
Jack Aker
Careerverified
Per 600 PAverified
9
51.92
Mike O'Connor
Career
Per 600 PA
2
34.29
Jack Aker
Careerverified
Per 600 PAverified
9
51.92
Mike O'Connor
Career
Per 600 PA
3
51.43
Jack Aker
Careerverified
Per 600 PAverified
0.096
0.096
Mike O'Connor
Career
Per 600 PA
0.088
0.088
Jack Aker
Careerverified
Per 600 PAverified
0.098
0.098
Mike O'Connor
Career
Per 600 PA
0.061
0.061
Jack Aker
Careerverified
Per 600 PAverified
0.194
0.194
Mike O'Connor
Career
Per 600 PA
0.149
0.149
Jack Aker
Careerverified
Per 600 PAverified
0.022
0.022
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
0.068
0.068
Mike O'Connor
Career
Per 600 PA
0.055
0.055
Jack Aker
Careerverified
Per 600 PAverified
0.128
0.128
Mike O'Connor
Career
Per 600 PA
0.097
0.097
Jack Aker
Careerverified
Per 600 PAverified
0.171
0.171
Mike O'Connor
Career
Per 600 PA
0.143
0.143
Jack Aker
Careerverified
Per 600 PA
3
17.31
Mike O'Connor
Career
Per 600 PAverified
2
34.29
Jack Aker
Careerverified
Per 600 PAverified
4
23.08
Mike O'Connor
Career
Per 600 PA
1
17.14
Jack Aker
Careerverified
Per 600 PA
7
40.38
Mike O'Connor
Career
Per 600 PAverified
3
51.43
Jack Aker
Career
Per 600 PAverified
-4.13
-23.83
Mike O'Connor
Careerverified
Per 600 PA
-1.8
-30.92
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Mike O'Connor
Career
Per 600 PAverified
1
17.14
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PAverified
51
294.23
Mike O'Connor
Careerverified
Per 600 PA
19
325.71
Jack Aker
Careerverified
Per 600 PAverified
2.04
2.04
Mike O'Connor
Career
Per 600 PA
1.84
1.84
Jack Aker
Career
Per 600 PA
0.02
0.02
Mike O'Connor
Careerverified
Per 600 PAverified
0.05
0.05
Jack Aker
Careerverified
Per 600 PAverified
10
57.69
Mike O'Connor
Career
Per 600 PA
1
17.14
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Mike O'Connor
Careerverified
Per 600 PAverified
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Mike O'Connor
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
Mike O'Connor
Career
Per 600 PA