Jack Aker vs. Rollie Sheldon — Career Comparison

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Rollie Sheldon
Silent GenerationConnecticutThrows RightBats RightNorth AmericaNew York YankeesAmerican LeagueStarting Pitcher

Rollie Sheldon 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. Rollie Sheldon led in walk avoidance (BB%+ 137 vs 100), home run suppression (HR9+ 86 vs 76), and skill-based run prevention (DICE+ 95 vs 88). Jack Aker held the edge in strikeout rate (K%+ 86 vs 82). Role difference aside, Rollie Sheldon holds a clear edge on every meaningful shared measure.

Pitching Stats for Jack Aker and Rollie Sheldon

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Rollie Sheldon
Career
Per 9 Innings
5
5
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Rollie Sheldon
Career
Per 9 Innings
160
1.99
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Careerverified
Per 9 Inningsverified
101
1.25
Jack Aker
Careerverified
Per 9 Inningsverified
47
0.57
Rollie Sheldon
Career
Per 9 Innings
38
0.47
Jack Aker
Career
Per 9 Innings
45
0.54
Rollie Sheldon
Careerverified
Per 9 Inningsverified
36
0.45
Jack Aker
Career
Per 9 Innings
51.09
51.09
Rollie Sheldon
Careerverified
Per 9 Inningsverified
51.35
51.35
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Careerverified
Per 9 Inningsverified
63.13
63.13
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Careerverified
Per 9 Inningsverified
17
0.21
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Careerverified
Per 9 Inningsverified
4
0.05
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Rollie Sheldon
Career
Per 9 Innings
2
0.02
Jack Aker
Careerverified
Per 9 Inningsverified
272
3.28
Rollie Sheldon
Career
Per 9 Innings
329
4.09
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Rollie Sheldon
Career
Per 9 Innings
4.09
4.09
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Rollie Sheldon
Career
Per 9 Innings
3.94
3.94
Jack Aker
Careerverified
Per 9 Inningsverified
4.29
4.29
Rollie Sheldon
Career
Per 9 Innings
4.45
4.45
Jack Aker
Careerverified
Per 9 Inningsverified
0.244
0.244
Rollie Sheldon
Career
Per 9 Innings
0.261
0.261
Jack Aker
Careerverified
Per 9 Innings
2238
27
Rollie Sheldon
Career
Per 9 Innings
2174
27
Jack Aker
Careerverified
Per 9 Innings
746
9
Rollie Sheldon
Career
Per 9 Innings
724.2
9
Jack Aker
Careerverified
Per 9 Inningsverified
679
8.19
Rollie Sheldon
Career
Per 9 Innings
741
9.2
Jack Aker
Careerverified
Per 9 Inningsverified
8.19
8.19
Rollie Sheldon
Career
Per 9 Innings
9.2
9.2
Jack Aker
Careerverified
Per 9 Inningsverified
64
0.77
Rollie Sheldon
Career
Per 9 Innings
87
1.08
Jack Aker
Careerverified
Per 9 Inningsverified
0.77
0.77
Rollie Sheldon
Career
Per 9 Innings
1.08
1.08
Jack Aker
Careerverified
Per 9 Inningsverified
0.13
0.13
Rollie Sheldon
Career
Per 9 Innings
0.54
0.54
Jack Aker
Career
Per 9 Innings
274
3.31
Rollie Sheldon
Careerverified
Per 9 Inningsverified
207
2.57
Jack Aker
Career
Per 9 Innings
68
0.82
Rollie Sheldon
Careerverified
Per 9 Inningsverified
17
0.21
Jack Aker
Career
Per 9 Innings
3.31
3.31
Rollie Sheldon
Careerverified
Per 9 Inningsverified
2.57
2.57
Jack Aker
Careerverified
Per 9 Inningsverified
404
4.87
Rollie Sheldon
Career
Per 9 Innings
371
4.61
Jack Aker
Careerverified
Per 9 Inningsverified
4.87
4.87
Rollie Sheldon
Career
Per 9 Innings
4.61
4.61
Jack Aker
Career
Per 9 Innings
0.82
0.82
Rollie Sheldon
Careerverified
Per 9 Inningsverified
2.32
2.32
Jack Aker
Careerverified
Per 9 Inningsverified
0.909
0.909
Rollie Sheldon
Career
Per 9 Innings
0.798
0.798
Jack Aker
Careerverified
Per 9 Inningsverified
13
0.16
Rollie Sheldon
Career
Per 9 Innings
24
0.3
Jack Aker
Career
Per 9 Innings
40
0.48
Rollie Sheldon
Careerverified
Per 9 Inningsverified
14
0.17
Jack Aker
Careerverified
Per 9 Inningsverified
0
0
Rollie Sheldon
Career
Per 9 Innings
1
0.01
Jack Aker
Careerverified
Per 9 Innings
3144
37.93
Rollie Sheldon
Career
Per 9 Inningsverified
3062
38.03
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Rollie Sheldon
Career
Per 9 Innings
19
0.24
Jack Aker
Careerverified
Per 9 Inningsverified
312
3.76
Rollie Sheldon
Career
Per 9 Innings
358
4.45
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Rollie Sheldon
Career
Per 9 Innings
4.45
4.45
Jack Aker
Career
Per 9 Innings
32
0.39
Rollie Sheldon
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Career
Per 9 Innings
12
0.14
Rollie Sheldon
Careerverified
Per 9 Inningsverified
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
19
0.23
Rollie Sheldon
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
1.278
1.278
Rollie Sheldon
Career
Per 9 Innings
1.308
1.308
Jack Aker
Career
Per 9 Innings
2786
33.61
Rollie Sheldon
Careerverified
Per 9 Inningsverified
2841
35.28
Jack Aker
Careerverified
Per 9 Inningsverified
0.63
0.63
Rollie Sheldon
Career
Per 9 Innings
2.24
2.24
Jack Aker
Careerverified
Per 9 Inningsverified
0.265
0.265
Rollie Sheldon
Career
Per 9 Innings
0.274
0.274
Jack Aker
Career
Per 9 Innings
37.93
37.93
Rollie Sheldon
Careerverified
Per 9 Inningsverified
38.03
38.03

Fielding Stats for Jack Aker and Rollie Sheldon

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Rollie Sheldon
Career
Per 9 Innings
5
5
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Rollie Sheldon
Career
Per 9 Innings
160
1.99
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Careerverified
Per 9 Inningsverified
101
1.25
Jack Aker
Careerverified
Per 9 Innings
2240
27
Rollie Sheldon
Career
Per 9 Innings
2174
27
Jack Aker
Careerverified
Per 9 Innings
746.2
9
Rollie Sheldon
Career
Per 9 Innings
724.2
9
Jack Aker
Careerverified
Per 9 Inningsverified
65
0.78
Rollie Sheldon
Career
Per 9 Innings
48
0.6
Jack Aker
Careerverified
Per 9 Inningsverified
167
2.01
Rollie Sheldon
Career
Per 9 Innings
119
1.48
Jack Aker
Career
Per 9 Innings
8
0.1
Rollie Sheldon
Careerverified
Per 9 Inningsverified
3
0.04
Jack Aker
Careerverified
Per 9 Inningsverified
240
2.89
Rollie Sheldon
Career
Per 9 Innings
170
2.11
Jack Aker
Careerverified
Per 9 Inningsverified
232
2.8
Rollie Sheldon
Career
Per 9 Innings
167
2.07
Jack Aker
Career
Per 9 Innings
96.67
96.67
Rollie Sheldon
Careerverified
Per 9 Inningsverified
98.24
98.24
Jack Aker
Career
Per 9 Innings
0.469
0.469
Rollie Sheldon
Careerverified
Per 9 Inningsverified
1.044
1.044
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Careerverified
Per 9 Inningsverified
63.13
63.13
Jack Aker
Careerverified
Per 9 Inningsverified
20
0.24
Rollie Sheldon
Career
Per 9 Innings
12
0.15
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Rollie Sheldon
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Rollie Sheldon

Jack Aker
Careerverified
Per 600 PAverified
11
11
Rollie Sheldon
Career
Per 600 PA
5
5
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Rollie Sheldon
Career
Per 600 PA
161
404.18
Jack Aker
Career
Per 600 PA
104
600
Rollie Sheldon
Careerverified
Per 600 PA
239
600
Jack Aker
Career
Per 600 PAverified
92
530.77
Rollie Sheldon
Careerverified
Per 600 PA
209
524.69
Jack Aker
Career
Per 600 PA
0.076
0.076
Rollie Sheldon
Careerverified
Per 600 PAverified
0.096
0.096
Jack Aker
Career
Per 600 PA
0.279
0.279
Rollie Sheldon
Careerverified
Per 600 PAverified
0.315
0.315
Jack Aker
Career
Per 600 PA
7
40.38
Rollie Sheldon
Careerverified
Per 600 PAverified
20
50.21
Jack Aker
Career
Per 600 PA
5
28.85
Rollie Sheldon
Careerverified
Per 600 PAverified
20
50.21
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
0.286
0.286
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0.81
4.66
Rollie Sheldon
Careerverified
Per 600 PAverified
2.07
5.19
Jack Aker
Career
Per 600 PAverified
9
51.92
Rollie Sheldon
Careerverified
Per 600 PA
20
50.21
Jack Aker
Career
Per 600 PA
9
51.92
Rollie Sheldon
Careerverified
Per 600 PAverified
31
77.82
Jack Aker
Career
Per 600 PA
0.096
0.096
Rollie Sheldon
Careerverified
Per 600 PAverified
0.141
0.141
Jack Aker
Careerverified
Per 600 PAverified
0.098
0.098
Rollie Sheldon
Career
Per 600 PA
0.096
0.096
Jack Aker
Career
Per 600 PA
0.194
0.194
Rollie Sheldon
Careerverified
Per 600 PAverified
0.237
0.237
Jack Aker
Careerverified
Per 600 PAverified
0.022
0.022
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0.068
0.068
Rollie Sheldon
Careerverified
Per 600 PAverified
0.087
0.087
Jack Aker
Career
Per 600 PA
0.128
0.128
Rollie Sheldon
Careerverified
Per 600 PAverified
0.16
0.16
Jack Aker
Career
Per 600 PA
0.171
0.171
Rollie Sheldon
Careerverified
Per 600 PAverified
0.208
0.208
Jack Aker
Career
Per 600 PAverified
3
17.31
Rollie Sheldon
Career
Per 600 PA
3
7.53
Jack Aker
Career
Per 600 PAverified
4
23.08
Rollie Sheldon
Careerverified
Per 600 PA
7
17.57
Jack Aker
Career
Per 600 PAverified
7
40.38
Rollie Sheldon
Careerverified
Per 600 PA
10
25.1
Jack Aker
Careerverified
Per 600 PA
-4.13
-23.83
Rollie Sheldon
Career
Per 600 PAverified
-6.03
-15.14
Jack Aker
Career
Per 600 PAverified
1
5.77
Rollie Sheldon
Career
Per 600 PA
1
2.51
Jack Aker
Career
Per 600 PA
1
5.77
Rollie Sheldon
Careerverified
Per 600 PAverified
10
25.1
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PA
51
294.23
Rollie Sheldon
Career
Per 600 PAverified
113
283.68
Jack Aker
Career
Per 600 PA
2.04
2.04
Rollie Sheldon
Careerverified
Per 600 PAverified
2.12
2.12
Jack Aker
Career
Per 600 PA
0.02
0.02
Rollie Sheldon
Careerverified
Per 600 PAverified
0.09
0.09
Jack Aker
Career
Per 600 PAverified
10
57.69
Rollie Sheldon
Careerverified
Per 600 PA
19
47.7
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Rollie Sheldon
Career
Per 600 PA
4
10.04
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Careerverified
Per 600 PAverified
1
2.51
Jack Aker
Career
Per 600 PA
0
0
Rollie Sheldon
Careerverified
Per 600 PAverified
1
2.51
Jack Aker
Career
Per 600 PA
Rollie Sheldon
Career
Per 600 PA
0
0