Jack Aker vs. Tom O'Brien — Career Comparison

You might be looking for a matchup, check Jack Aker's matchup page instead!

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Tom O'Brien
Pre-GenerationalMassachusettsThrows RightBats RightNorth AmericaBoston RedsUnion AssociationSecond Baseman

Tom O'Brien is a position player and Jack Aker a pitcher — the stats that define each role measure entirely different things, so a direct comparison doesn't hold up. If Tom O'Brien ever faced Jack Aker, check out their matchup page.

Pitching Stats for Jack Aker and Tom O'Brien

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Tom O'Brien
Career
Per 9 Innings
1
1
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Tom O'Brien
Career
Per 9 Innings
1
2.45
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
47
0.57
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
45
0.54
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
51.09
51.09
Tom O'Brien
Career
Per 9 Innings
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Inningsverified
272
3.28
Tom O'Brien
Careerverified
Per 9 Innings
3
7.36
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Tom O'Brien
Career
Per 9 Innings
7.36
7.36
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Tom O'Brien
Career
Per 9 Innings
6.13
6.13
Jack Aker
Careerverified
Per 9 Inningsverified
4.29
4.29
Tom O'Brien
Career
Per 9 Innings
7.09
7.09
Jack Aker
Career
Per 9 Innings
0.244
0.244
Tom O'Brien
Careerverified
Per 9 Inningsverified
0.211
0.211
Jack Aker
Careerverified
Per 9 Innings
2238
27
Tom O'Brien
Career
Per 9 Innings
11
27
Jack Aker
Careerverified
Per 9 Innings
746
9
Tom O'Brien
Career
Per 9 Innings
3.2
9
Jack Aker
Career
Per 9 Inningsverified
679
8.19
Tom O'Brien
Careerverified
Per 9 Innings
4
9.82
Jack Aker
Careerverified
Per 9 Inningsverified
8.19
8.19
Tom O'Brien
Career
Per 9 Innings
9.82
9.82
Jack Aker
Career
Per 9 Innings
64
0.77
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Innings
0.77
0.77
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Innings
0.13
0.13
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Inningsverified
274
3.31
Tom O'Brien
Careerverified
Per 9 Innings
5
12.27
Jack Aker
Career
Per 9 Innings
68
0.82
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
3.31
3.31
Tom O'Brien
Career
Per 9 Innings
12.27
12.27
Jack Aker
Careerverified
Per 9 Inningsverified
404
4.87
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
4.87
4.87
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
0.82
0.82
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0.909
0.909
Tom O'Brien
Careerverified
Per 9 Inningsverified
1.364
1.364
Jack Aker
Career
Per 9 Innings
13
0.16
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Innings
40
0.48
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Innings
3144
37.93
Tom O'Brien
Career
Per 9 Inningsverified
24
58.91
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Inningsverified
312
3.76
Tom O'Brien
Careerverified
Per 9 Innings
5
12.27
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Tom O'Brien
Career
Per 9 Innings
12.27
12.27
Jack Aker
Career
Per 9 Innings
32
0.39
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Innings
12
0.14
Tom O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
19
0.23
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
1.278
1.278
Tom O'Brien
Career
Per 9 Innings
2.455
2.455
Jack Aker
Careerverified
Per 9 Innings
2786
33.61
Tom O'Brien
Career
Per 9 Inningsverified
19
46.64
Jack Aker
Careerverified
Per 9 Inningsverified
0.63
0.63
Tom O'Brien
Career
Per 9 Innings
5
5
Jack Aker
Career
Per 9 Innings
0.265
0.265
Tom O'Brien
Careerverified
Per 9 Inningsverified
0.211
0.211
Jack Aker
Career
Per 9 Innings
37.93
37.93
Tom O'Brien
Careerverified
Per 9 Inningsverified
58.91
58.91

Fielding Stats for Jack Aker and Tom O'Brien

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Tom O'Brien
Career
Per 9 Innings
6
6
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Tom O'Brien
Career
Per 9 Innings
278
1.04
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
2240
27
Tom O'Brien
Careerverified
Per 9 Innings
7221
27
Jack Aker
Career
Per 9 Innings
746.2
9
Tom O'Brien
Careerverified
Per 9 Innings
2407
9
Jack Aker
Career
Per 9 Innings
65
0.78
Tom O'Brien
Careerverified
Per 9 Inningsverified
1353
5.06
Jack Aker
Career
Per 9 Inningsverified
167
2.01
Tom O'Brien
Careerverified
Per 9 Innings
433
1.62
Jack Aker
Careerverified
Per 9 Inningsverified
8
0.1
Tom O'Brien
Career
Per 9 Innings
187
0.7
Jack Aker
Career
Per 9 Innings
240
2.89
Tom O'Brien
Careerverified
Per 9 Inningsverified
1973
7.38
Jack Aker
Career
Per 9 Innings
232
2.8
Tom O'Brien
Careerverified
Per 9 Inningsverified
1786
6.68
Jack Aker
Careerverified
Per 9 Inningsverified
96.67
96.67
Tom O'Brien
Career
Per 9 Innings
90.52
90.52
Jack Aker
Career
Per 9 Innings
0.469
0.469
Tom O'Brien
Careerverified
Per 9 Inningsverified
6.425
6.425
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
20
0.24
Tom O'Brien
Careerverified
Per 9 Inningsverified
87
0.33
Jack Aker
Careerverified
Per 9 Inningsverified
0
0
Tom O'Brien
Career
Per 9 Innings
2
0.01
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Tom O'Brien
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Tom O'Brien

Jack Aker
Careerverified
Per 600 PAverified
11
11
Tom O'Brien
Career
Per 600 PA
6
6
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Tom O'Brien
Career
Per 600 PA
270
139.06
Jack Aker
Career
Per 600 PA
104
600
Tom O'Brien
Careerverified
Per 600 PA
1165
600
Jack Aker
Career
Per 600 PA
92
530.77
Tom O'Brien
Careerverified
Per 600 PAverified
1111
572.19
Jack Aker
Career
Per 600 PA
0.076
0.076
Tom O'Brien
Careerverified
Per 600 PAverified
0.231
0.231
Jack Aker
Career
Per 600 PA
0.279
0.279
Tom O'Brien
Careerverified
Per 600 PAverified
0.609
0.609
Jack Aker
Career
Per 600 PA
7
40.38
Tom O'Brien
Careerverified
Per 600 PAverified
257
132.36
Jack Aker
Career
Per 600 PA
5
28.85
Tom O'Brien
Careerverified
Per 600 PAverified
183
94.25
Jack Aker
Career
Per 600 PA
2
11.54
Tom O'Brien
Careerverified
Per 600 PAverified
50
25.75
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Careerverified
Per 600 PAverified
20
10.3
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Careerverified
Per 600 PAverified
4
2.06
Jack Aker
Career
Per 600 PA
2
11.54
Tom O'Brien
Careerverified
Per 600 PAverified
74
38.11
Jack Aker
Career
Per 600 PA
0.286
0.286
Tom O'Brien
Careerverified
Per 600 PAverified
0.288
0.288
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Careerverified
Per 600 PAverified
0.004
0.004
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Careerverified
Per 600 PAverified
0.016
0.016
Jack Aker
Career
Per 600 PA
0.81
4.66
Tom O'Brien
Careerverified
Per 600 PAverified
100.55
51.79
Jack Aker
Career
Per 600 PA
9
51.92
Tom O'Brien
Careerverified
Per 600 PAverified
359
184.89
Jack Aker
Career
Per 600 PA
9
51.92
Tom O'Brien
Careerverified
Per 600 PAverified
311
160.17
Jack Aker
Career
Per 600 PA
0.096
0.096
Tom O'Brien
Careerverified
Per 600 PAverified
0.267
0.267
Jack Aker
Career
Per 600 PA
0.098
0.098
Tom O'Brien
Careerverified
Per 600 PAverified
0.323
0.323
Jack Aker
Career
Per 600 PA
0.194
0.194
Tom O'Brien
Careerverified
Per 600 PAverified
0.59
0.59
Jack Aker
Career
Per 600 PA
0.022
0.022
Tom O'Brien
Careerverified
Per 600 PAverified
0.092
0.092
Jack Aker
Career
Per 600 PA
0.068
0.068
Tom O'Brien
Careerverified
Per 600 PAverified
0.201
0.201
Jack Aker
Career
Per 600 PA
0.128
0.128
Tom O'Brien
Careerverified
Per 600 PAverified
0.502
0.502
Jack Aker
Career
Per 600 PA
0.171
0.171
Tom O'Brien
Careerverified
Per 600 PAverified
0.234
0.234
Jack Aker
Career
Per 600 PA
3
17.31
Tom O'Brien
Careerverified
Per 600 PAverified
158
81.37
Jack Aker
Career
Per 600 PA
4
23.08
Tom O'Brien
Careerverified
Per 600 PAverified
61
31.42
Jack Aker
Career
Per 600 PA
7
40.38
Tom O'Brien
Careerverified
Per 600 PAverified
215
110.73
Jack Aker
Career
Per 600 PA
-4.13
-23.83
Tom O'Brien
Careerverified
Per 600 PAverified
109
56.14
Jack Aker
Career
Per 600 PAverified
1
5.77
Tom O'Brien
Careerverified
Per 600 PA
2
1.03
Jack Aker
Career
Per 600 PA
1
5.77
Tom O'Brien
Careerverified
Per 600 PAverified
52
26.78
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
51
294.23
Tom O'Brien
Careerverified
Per 600 PAverified
24
12.36
Jack Aker
Career
Per 600 PA
2.04
2.04
Tom O'Brien
Careerverified
Per 600 PAverified
48.54
48.54
Jack Aker
Career
Per 600 PA
0.02
0.02
Tom O'Brien
Careerverified
Per 600 PAverified
2.17
2.17
Jack Aker
Careerverified
Per 600 PAverified
10
57.69
Tom O'Brien
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Tom O'Brien
Careerverified
Per 600 PAverified
0
0
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Careerverified
Per 600 PAverified
16
8.24
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Tom O'Brien
Careerverified
Per 600 PAverified
16
8.24
Jack Aker
Career
Per 600 PA
Tom O'Brien
Careerverified
Per 600 PAverified
100
100