Jack Aker vs. Riley O'Brien — Career Comparison

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Riley O'Brien
MillenialWashingtonThrows RightBats RightNorth AmericaSt. Louis CardinalsNational LeagueRelief Pitcher

On the career pitching numbers, Jack Aker posted a stronger line than Riley O'Brien. Jack Aker posted stronger numbers in ERA (3.28 vs 3.55) and WHIP (1.369 vs 1.457). By the career numbers, Jack Aker had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.

Pitching Stats for Jack Aker and Riley O'Brien

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Riley O'Brien
Career
Per 9 Innings
4
4
Jack Aker
Careerverified
Per 9 Innings
495
5.97
Riley O'Brien
Career
Per 9 Inningsverified
52
8.02
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Careerverified
Per 9 Inningsverified
1
0.15
Jack Aker
Careerverified
Per 9 Inningsverified
47
0.57
Riley O'Brien
Career
Per 9 Innings
3
0.46
Jack Aker
Career
Per 9 Innings
45
0.54
Riley O'Brien
Careerverified
Per 9 Inningsverified
2
0.31
Jack Aker
Career
Per 9 Innings
51.09
51.09
Riley O'Brien
Careerverified
Per 9 Inningsverified
60
60
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Careerverified
Per 9 Inningsverified
1.92
1.92
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Riley O'Brien
Career
Per 9 Innings
6
0.93
Jack Aker
Career
Per 9 Inningsverified
272
3.28
Riley O'Brien
Careerverified
Per 9 Innings
23
3.55
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Riley O'Brien
Career
Per 9 Innings
3.55
3.55
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Riley O'Brien
Career
Per 9 Innings
4.42
4.42
Jack Aker
Careerverified
Per 9 Inningsverified
4.29
4.29
Riley O'Brien
Career
Per 9 Innings
4.47
4.47
Jack Aker
Career
Per 9 Innings
0.244
0.244
Riley O'Brien
Careerverified
Per 9 Inningsverified
0.229
0.229
Jack Aker
Careerverified
Per 9 Innings
2238
27
Riley O'Brien
Career
Per 9 Innings
175
27
Jack Aker
Careerverified
Per 9 Innings
746
9
Riley O'Brien
Career
Per 9 Innings
58.1
9
Jack Aker
Career
Per 9 Innings
679
8.19
Riley O'Brien
Careerverified
Per 9 Inningsverified
49
7.56
Jack Aker
Career
Per 9 Innings
8.19
8.19
Riley O'Brien
Careerverified
Per 9 Inningsverified
7.56
7.56
Jack Aker
Career
Per 9 Inningsverified
64
0.77
Riley O'Brien
Careerverified
Per 9 Innings
6
0.93
Jack Aker
Careerverified
Per 9 Inningsverified
0.77
0.77
Riley O'Brien
Career
Per 9 Innings
0.93
0.93
Jack Aker
Career
Per 9 Innings
0.13
0.13
Riley O'Brien
Careerverified
Per 9 Inningsverified
0.12
0.12
Jack Aker
Career
Per 9 Inningsverified
274
3.31
Riley O'Brien
Careerverified
Per 9 Innings
34
5.25
Jack Aker
Career
Per 9 Innings
68
0.82
Riley O'Brien
Careerverified
Per 9 Inningsverified
2
0.31
Jack Aker
Careerverified
Per 9 Inningsverified
3.31
3.31
Riley O'Brien
Career
Per 9 Innings
5.25
5.25
Jack Aker
Careerverified
Per 9 Innings
404
4.87
Riley O'Brien
Career
Per 9 Inningsverified
59
9.1
Jack Aker
Career
Per 9 Innings
4.87
4.87
Riley O'Brien
Careerverified
Per 9 Inningsverified
9.1
9.1
Jack Aker
Career
Per 9 Innings
0.82
0.82
Riley O'Brien
Careerverified
Per 9 Inningsverified
1.13
1.13
Jack Aker
Career
Per 9 Innings
0.909
0.909
Riley O'Brien
Careerverified
Per 9 Inningsverified
1.594
1.594
Jack Aker
Career
Per 9 Inningsverified
13
0.16
Riley O'Brien
Careerverified
Per 9 Innings
4
0.62
Jack Aker
Career
Per 9 Inningsverified
40
0.48
Riley O'Brien
Careerverified
Per 9 Innings
8
1.23
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Innings
3144
37.93
Riley O'Brien
Career
Per 9 Inningsverified
259
39.96
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Riley O'Brien
Career
Per 9 Innings
20
3.09
Jack Aker
Career
Per 9 Inningsverified
312
3.76
Riley O'Brien
Careerverified
Per 9 Innings
25
3.86
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Riley O'Brien
Career
Per 9 Innings
3.86
3.86
Jack Aker
Career
Per 9 Innings
32
0.39
Riley O'Brien
Careerverified
Per 9 Inningsverified
1
0.15
Jack Aker
Career
Per 9 Inningsverified
12
0.14
Riley O'Brien
Careerverified
Per 9 Innings
2
0.31
Jack Aker
Careerverified
Per 9 Innings
19
0.23
Riley O'Brien
Career
Per 9 Inningsverified
6
0.93
Jack Aker
Careerverified
Per 9 Inningsverified
1.278
1.278
Riley O'Brien
Career
Per 9 Innings
1.423
1.423
Jack Aker
Careerverified
Per 9 Inningsverified
2786
33.61
Riley O'Brien
Career
Per 9 Innings
214
33.02
Jack Aker
Career
Per 9 Innings
0.63
0.63
Riley O'Brien
Careerverified
Per 9 Inningsverified
0.48
0.48
Jack Aker
Careerverified
Per 9 Inningsverified
0.265
0.265
Riley O'Brien
Career
Per 9 Innings
0.289
0.289
Jack Aker
Career
Per 9 Innings
37.93
37.93
Riley O'Brien
Careerverified
Per 9 Inningsverified
39.96
39.96

Fielding Stats for Jack Aker and Riley O'Brien

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Riley O'Brien
Career
Per 9 Innings
4
4
Jack Aker
Careerverified
Per 9 Innings
495
5.97
Riley O'Brien
Career
Per 9 Inningsverified
52
8.02
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Careerverified
Per 9 Inningsverified
1
0.15
Jack Aker
Careerverified
Per 9 Innings
2240
27
Riley O'Brien
Career
Per 9 Innings
175
27
Jack Aker
Careerverified
Per 9 Innings
746.2
9
Riley O'Brien
Career
Per 9 Innings
58.1
9
Jack Aker
Careerverified
Per 9 Inningsverified
65
0.78
Riley O'Brien
Career
Per 9 Innings
5
0.77
Jack Aker
Careerverified
Per 9 Inningsverified
167
2.01
Riley O'Brien
Career
Per 9 Innings
8
1.23
Jack Aker
Career
Per 9 Innings
8
0.1
Riley O'Brien
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
240
2.89
Riley O'Brien
Career
Per 9 Innings
13
2.01
Jack Aker
Careerverified
Per 9 Inningsverified
232
2.8
Riley O'Brien
Career
Per 9 Innings
13
2.01
Jack Aker
Career
Per 9 Innings
96.67
96.67
Riley O'Brien
Careerverified
Per 9 Inningsverified
100
100
Jack Aker
Careerverified
Per 9 Inningsverified
0.469
0.469
Riley O'Brien
Career
Per 9 Innings
0.25
0.25
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Careerverified
Per 9 Inningsverified
1.92
1.92
Jack Aker
Careerverified
Per 9 Inningsverified
20
0.24
Riley O'Brien
Career
Per 9 Innings
1
0.15
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Riley O'Brien
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Riley O'Brien

Jack Aker
Careerverified
Per 600 PAverified
11
11
Riley O'Brien
Career
Per 600 PA
4
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Riley O'Brien
Career
Per 600 PA
52
Jack Aker
Careerverified
Per 600 PAverified
104
600
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
92
530.77
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
0.076
0.076
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.279
0.279
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
7
40.38
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
5
28.85
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
0.286
0.286
Riley O'Brien
Career
Per 600 PA
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.81
4.66
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
9
51.92
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
9
51.92
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
0.096
0.096
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.098
0.098
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.194
0.194
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.022
0.022
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.068
0.068
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.128
0.128
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.171
0.171
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
3
17.31
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
4
23.08
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
7
40.38
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
-4.13
-23.83
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
51
294.23
Riley O'Brien
Careerverified
Per 600 PAverified
0
Jack Aker
Careerverified
Per 600 PAverified
2.04
2.04
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
0.02
0.02
Riley O'Brien
Career
Per 600 PA
Jack Aker
Careerverified
Per 600 PAverified
10
57.69
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
1
5.77
Riley O'Brien
Careerverified
Per 600 PAverified
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
0
0
Riley O'Brien
Career
Per 600 PA
0
Jack Aker
Career
Per 600 PA
Riley O'Brien
Career
Per 600 PA