Jack Aker vs. Casey Fossum — Career Comparison

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Casey Fossum
Gen XNew JerseyThrows LeftBats LeftNorth AmericaTampa Bay RaysAmerican LeagueStarting Pitcher

Casey Fossum 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. Casey Fossum led in strikeout rate (K%+ 115 vs 86), home run suppression (HR9+ 89 vs 76), and skill-based run prevention (DICE+ 96 vs 88). Jack Aker held the edge in walk avoidance (BB%+ 100 vs 91). Role difference aside, Casey Fossum holds a clear edge on every meaningful shared measure.

Pitching Stats for Jack Aker and Casey Fossum

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Casey Fossum
Career
Per 9 Innings
9
9
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Casey Fossum
Career
Per 9 Innings
237
2.71
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Careerverified
Per 9 Inningsverified
120
1.37
Jack Aker
Careerverified
Per 9 Inningsverified
47
0.57
Casey Fossum
Career
Per 9 Innings
40
0.46
Jack Aker
Careerverified
Per 9 Inningsverified
45
0.54
Casey Fossum
Career
Per 9 Innings
53
0.61
Jack Aker
Careerverified
Per 9 Inningsverified
51.09
51.09
Casey Fossum
Career
Per 9 Innings
43.01
43.01
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Careerverified
Per 9 Inningsverified
50.63
50.63
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Casey Fossum
Career
Per 9 Innings
2
0.02
Jack Aker
Careerverified
Per 9 Inningsverified
272
3.28
Casey Fossum
Career
Per 9 Innings
476
5.45
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Casey Fossum
Career
Per 9 Innings
5.45
5.45
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Casey Fossum
Career
Per 9 Innings
5.37
5.37
Jack Aker
Careerverified
Per 9 Inningsverified
4.29
4.29
Casey Fossum
Career
Per 9 Innings
4.8
4.8
Jack Aker
Careerverified
Per 9 Inningsverified
0.244
0.244
Casey Fossum
Career
Per 9 Innings
0.281
0.281
Jack Aker
Career
Per 9 Innings
2238
27
Casey Fossum
Careerverified
Per 9 Innings
2358
27
Jack Aker
Career
Per 9 Innings
746
9
Casey Fossum
Careerverified
Per 9 Innings
786
9
Jack Aker
Careerverified
Per 9 Inningsverified
679
8.19
Casey Fossum
Career
Per 9 Innings
873
10
Jack Aker
Careerverified
Per 9 Inningsverified
8.19
8.19
Casey Fossum
Career
Per 9 Innings
10
10
Jack Aker
Careerverified
Per 9 Inningsverified
64
0.77
Casey Fossum
Career
Per 9 Innings
114
1.31
Jack Aker
Careerverified
Per 9 Inningsverified
0.77
0.77
Casey Fossum
Career
Per 9 Innings
1.31
1.31
Jack Aker
Careerverified
Per 9 Inningsverified
0.13
0.13
Casey Fossum
Career
Per 9 Innings
0.48
0.48
Jack Aker
Careerverified
Per 9 Inningsverified
274
3.31
Casey Fossum
Career
Per 9 Innings
319
3.65
Jack Aker
Career
Per 9 Innings
68
0.82
Casey Fossum
Careerverified
Per 9 Inningsverified
14
0.16
Jack Aker
Careerverified
Per 9 Inningsverified
3.31
3.31
Casey Fossum
Career
Per 9 Innings
3.65
3.65
Jack Aker
Career
Per 9 Innings
404
4.87
Casey Fossum
Careerverified
Per 9 Inningsverified
607
6.95
Jack Aker
Career
Per 9 Innings
4.87
4.87
Casey Fossum
Careerverified
Per 9 Inningsverified
6.95
6.95
Jack Aker
Career
Per 9 Innings
0.82
0.82
Casey Fossum
Careerverified
Per 9 Inningsverified
2.56
2.56
Jack Aker
Career
Per 9 Innings
0.909
0.909
Casey Fossum
Careerverified
Per 9 Inningsverified
1.178
1.178
Jack Aker
Careerverified
Per 9 Inningsverified
13
0.16
Casey Fossum
Career
Per 9 Innings
28
0.32
Jack Aker
Careerverified
Per 9 Inningsverified
40
0.48
Casey Fossum
Career
Per 9 Innings
63
0.72
Jack Aker
Careerverified
Per 9 Inningsverified
0
0
Casey Fossum
Career
Per 9 Innings
5
0.06
Jack Aker
Career
Per 9 Innings
3144
37.93
Casey Fossum
Careerverified
Per 9 Inningsverified
3537
40.5
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Casey Fossum
Career
Per 9 Innings
35
0.4
Jack Aker
Careerverified
Per 9 Inningsverified
312
3.76
Casey Fossum
Career
Per 9 Innings
535
6.13
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Casey Fossum
Career
Per 9 Innings
6.13
6.13
Jack Aker
Career
Per 9 Innings
32
0.39
Casey Fossum
Careerverified
Per 9 Inningsverified
18
0.21
Jack Aker
Careerverified
Per 9 Inningsverified
12
0.14
Casey Fossum
Career
Per 9 Innings
27
0.31
Jack Aker
Career
Per 9 Innings
19
0.23
Casey Fossum
Careerverified
Per 9 Inningsverified
65
0.74
Jack Aker
Careerverified
Per 9 Inningsverified
1.278
1.278
Casey Fossum
Career
Per 9 Innings
1.517
1.517
Jack Aker
Career
Per 9 Innings
2786
33.61
Casey Fossum
Careerverified
Per 9 Inningsverified
3110
35.61
Jack Aker
Careerverified
Per 9 Inningsverified
0.63
0.63
Casey Fossum
Career
Per 9 Innings
2.26
2.26
Jack Aker
Careerverified
Per 9 Inningsverified
0.265
0.265
Casey Fossum
Career
Per 9 Innings
0.318
0.318
Jack Aker
Career
Per 9 Innings
37.93
37.93
Casey Fossum
Careerverified
Per 9 Inningsverified
40.5
40.5

Fielding Stats for Jack Aker and Casey Fossum

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Casey Fossum
Career
Per 9 Innings
9
9
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Casey Fossum
Career
Per 9 Innings
237
2.71
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Careerverified
Per 9 Inningsverified
120
1.37
Jack Aker
Career
Per 9 Innings
2240
27
Casey Fossum
Careerverified
Per 9 Innings
2358
27
Jack Aker
Career
Per 9 Innings
746.2
9
Casey Fossum
Careerverified
Per 9 Innings
786
9
Jack Aker
Careerverified
Per 9 Inningsverified
65
0.78
Casey Fossum
Career
Per 9 Innings
38
0.44
Jack Aker
Careerverified
Per 9 Inningsverified
167
2.01
Casey Fossum
Career
Per 9 Innings
91
1.04
Jack Aker
Career
Per 9 Innings
8
0.1
Casey Fossum
Careerverified
Per 9 Inningsverified
2
0.02
Jack Aker
Careerverified
Per 9 Inningsverified
240
2.89
Casey Fossum
Career
Per 9 Innings
131
1.5
Jack Aker
Careerverified
Per 9 Inningsverified
232
2.8
Casey Fossum
Career
Per 9 Innings
129
1.48
Jack Aker
Career
Per 9 Innings
96.67
96.67
Casey Fossum
Careerverified
Per 9 Inningsverified
98.47
98.47
Jack Aker
Career
Per 9 Innings
0.469
0.469
Casey Fossum
Careerverified
Per 9 Inningsverified
0.544
0.544
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Careerverified
Per 9 Inningsverified
50.63
50.63
Jack Aker
Careerverified
Per 9 Inningsverified
20
0.24
Casey Fossum
Career
Per 9 Innings
5
0.06
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Casey Fossum
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Casey Fossum

Jack Aker
Careerverified
Per 600 PAverified
11
11
Casey Fossum
Career
Per 600 PA
9
9
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Casey Fossum
Career
Per 600 PA
240
2823.53
Jack Aker
Careerverified
Per 600 PA
104
600
Casey Fossum
Career
Per 600 PA
51
600
Jack Aker
Careerverified
Per 600 PA
92
530.77
Casey Fossum
Career
Per 600 PAverified
46
541.18
Jack Aker
Career
Per 600 PA
0.076
0.076
Casey Fossum
Careerverified
Per 600 PAverified
0.087
0.087
Jack Aker
Careerverified
Per 600 PAverified
0.279
0.279
Casey Fossum
Career
Per 600 PA
0.265
0.265
Jack Aker
Careerverified
Per 600 PA
7
40.38
Casey Fossum
Career
Per 600 PAverified
4
47.06
Jack Aker
Careerverified
Per 600 PA
5
28.85
Casey Fossum
Career
Per 600 PAverified
4
47.06
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
2
11.54
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
0.286
0.286
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
0.81
4.66
Casey Fossum
Career
Per 600 PA
0.29
3.4
Jack Aker
Careerverified
Per 600 PAverified
9
51.92
Casey Fossum
Career
Per 600 PA
4
47.06
Jack Aker
Careerverified
Per 600 PA
9
51.92
Casey Fossum
Career
Per 600 PAverified
5
58.82
Jack Aker
Career
Per 600 PA
0.096
0.096
Casey Fossum
Careerverified
Per 600 PAverified
0.106
0.106
Jack Aker
Careerverified
Per 600 PAverified
0.098
0.098
Casey Fossum
Career
Per 600 PA
0.087
0.087
Jack Aker
Careerverified
Per 600 PAverified
0.194
0.194
Casey Fossum
Career
Per 600 PA
0.193
0.193
Jack Aker
Careerverified
Per 600 PAverified
0.022
0.022
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0.068
0.068
Casey Fossum
Careerverified
Per 600 PAverified
0.07
0.07
Jack Aker
Careerverified
Per 600 PAverified
0.128
0.128
Casey Fossum
Career
Per 600 PA
0.116
0.116
Jack Aker
Careerverified
Per 600 PAverified
0.171
0.171
Casey Fossum
Career
Per 600 PA
0.133
0.133
Jack Aker
Career
Per 600 PA
3
17.31
Casey Fossum
Career
Per 600 PAverified
3
35.29
Jack Aker
Careerverified
Per 600 PAverified
4
23.08
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PAverified
7
40.38
Casey Fossum
Career
Per 600 PA
3
35.29
Jack Aker
Career
Per 600 PA
-4.13
-23.83
Casey Fossum
Careerverified
Per 600 PAverified
-1.94
-22.87
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Casey Fossum
Career
Per 600 PAverified
1
11.76
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
51
294.23
Casey Fossum
Careerverified
Per 600 PAverified
16
188.24
Jack Aker
Career
Per 600 PA
2.04
2.04
Casey Fossum
Careerverified
Per 600 PAverified
3.19
3.19
Jack Aker
Career
Per 600 PA
0.02
0.02
Casey Fossum
Careerverified
Per 600 PAverified
0.06
0.06
Jack Aker
Careerverified
Per 600 PAverified
10
57.69
Casey Fossum
Career
Per 600 PA
4
47.06
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PAverified
1
5.77
Casey Fossum
Career
Per 600 PA
1
11.76
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Casey Fossum
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
Casey Fossum
Career
Per 600 PA