Jack Aker vs. Doug Fister — Career Comparison

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Doug Fister
MillenialCaliforniaThrows RightBats LeftNorth AmericaDetroit TigersAmerican LeagueStarting Pitcher

Doug Fister 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. Doug Fister led in walk avoidance (BB%+ 148 vs 100), home run suppression (HR9+ 112 vs 76), and run prevention (ERA+ 114 vs 89). Jack Aker held the edge in strikeout rate (K%+ 86 vs 81). Role difference aside, Doug Fister holds a clear edge on every meaningful shared measure.

Pitching Stats for Jack Aker and Doug Fister

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Doug Fister
Career
Per 9 Innings
10
10
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Doug Fister
Career
Per 9 Innings
242
1.53
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Careerverified
Per 9 Inningsverified
226
1.43
Jack Aker
Career
Per 9 Inningsverified
47
0.57
Doug Fister
Careerverified
Per 9 Innings
83
0.53
Jack Aker
Careerverified
Per 9 Inningsverified
45
0.54
Doug Fister
Career
Per 9 Innings
92
0.58
Jack Aker
Careerverified
Per 9 Inningsverified
51.09
51.09
Doug Fister
Career
Per 9 Innings
47.43
47.43
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Careerverified
Per 9 Inningsverified
93.39
93.39
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Careerverified
Per 9 Inningsverified
8
0.05
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Careerverified
Per 9 Inningsverified
2
0.01
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Doug Fister
Career
Per 9 Innings
1
0.01
Jack Aker
Careerverified
Per 9 Inningsverified
272
3.28
Doug Fister
Career
Per 9 Innings
588
3.72
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Doug Fister
Career
Per 9 Innings
3.72
3.72
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Doug Fister
Career
Per 9 Innings
3.75
3.75
Jack Aker
Career
Per 9 Innings
4.29
4.29
Doug Fister
Careerverified
Per 9 Inningsverified
3.77
3.77
Jack Aker
Careerverified
Per 9 Inningsverified
0.244
0.244
Doug Fister
Career
Per 9 Innings
0.264
0.264
Jack Aker
Career
Per 9 Innings
2238
27
Doug Fister
Careerverified
Per 9 Innings
4267
27
Jack Aker
Career
Per 9 Innings
746
9
Doug Fister
Careerverified
Per 9 Innings
1422.1
9
Jack Aker
Careerverified
Per 9 Inningsverified
679
8.19
Doug Fister
Career
Per 9 Innings
1456
9.21
Jack Aker
Careerverified
Per 9 Inningsverified
8.19
8.19
Doug Fister
Career
Per 9 Innings
9.21
9.21
Jack Aker
Careerverified
Per 9 Inningsverified
64
0.77
Doug Fister
Career
Per 9 Innings
140
0.89
Jack Aker
Careerverified
Per 9 Inningsverified
0.77
0.77
Doug Fister
Career
Per 9 Innings
0.89
0.89
Jack Aker
Careerverified
Per 9 Inningsverified
0.13
0.13
Doug Fister
Career
Per 9 Innings
0.58
0.58
Jack Aker
Careerverified
Per 9 Innings
274
3.31
Doug Fister
Career
Per 9 Inningsverified
332
2.1
Jack Aker
Career
Per 9 Innings
68
0.82
Doug Fister
Careerverified
Per 9 Inningsverified
14
0.09
Jack Aker
Career
Per 9 Innings
3.31
3.31
Doug Fister
Careerverified
Per 9 Inningsverified
2.1
2.1
Jack Aker
Career
Per 9 Innings
404
4.87
Doug Fister
Careerverified
Per 9 Inningsverified
970
6.14
Jack Aker
Career
Per 9 Innings
4.87
4.87
Doug Fister
Careerverified
Per 9 Inningsverified
6.14
6.14
Jack Aker
Career
Per 9 Innings
0.82
0.82
Doug Fister
Careerverified
Per 9 Inningsverified
4.01
4.01
Jack Aker
Career
Per 9 Innings
0.909
0.909
Doug Fister
Careerverified
Per 9 Inningsverified
0.915
0.915
Jack Aker
Careerverified
Per 9 Inningsverified
13
0.16
Doug Fister
Career
Per 9 Innings
39
0.25
Jack Aker
Careerverified
Per 9 Innings
40
0.48
Doug Fister
Career
Per 9 Inningsverified
72
0.46
Jack Aker
Careerverified
Per 9 Inningsverified
0
0
Doug Fister
Career
Per 9 Innings
5
0.03
Jack Aker
Career
Per 9 Inningsverified
3144
37.93
Doug Fister
Careerverified
Per 9 Innings
5976
37.81
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Doug Fister
Career
Per 9 Innings
6
0.04
Jack Aker
Careerverified
Per 9 Inningsverified
312
3.76
Doug Fister
Career
Per 9 Innings
655
4.14
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Doug Fister
Career
Per 9 Innings
4.14
4.14
Jack Aker
Career
Per 9 Innings
32
0.39
Doug Fister
Careerverified
Per 9 Inningsverified
27
0.17
Jack Aker
Careerverified
Per 9 Inningsverified
12
0.14
Doug Fister
Career
Per 9 Innings
34
0.22
Jack Aker
Career
Per 9 Innings
19
0.23
Doug Fister
Careerverified
Per 9 Inningsverified
141
0.89
Jack Aker
Career
Per 9 Innings
1.278
1.278
Doug Fister
Careerverified
Per 9 Inningsverified
1.257
1.257
Jack Aker
Career
Per 9 Innings
2786
33.61
Doug Fister
Careerverified
Per 9 Inningsverified
5511
34.87
Jack Aker
Careerverified
Per 9 Inningsverified
0.63
0.63
Doug Fister
Career
Per 9 Innings
2.71
2.71
Jack Aker
Careerverified
Per 9 Inningsverified
0.265
0.265
Doug Fister
Career
Per 9 Innings
0.299
0.299
Jack Aker
Careerverified
Per 9 Inningsverified
37.93
37.93
Doug Fister
Career
Per 9 Innings
37.81
37.81

Fielding Stats for Jack Aker and Doug Fister

Jack Aker
Careerverified
Per 9 Inningsverified
11
11
Doug Fister
Career
Per 9 Innings
10
10
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Doug Fister
Career
Per 9 Innings
242
1.53
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Careerverified
Per 9 Inningsverified
226
1.43
Jack Aker
Career
Per 9 Innings
2240
27
Doug Fister
Careerverified
Per 9 Innings
4267
27
Jack Aker
Career
Per 9 Innings
746.2
9
Doug Fister
Careerverified
Per 9 Innings
1422.1
9
Jack Aker
Career
Per 9 Innings
65
0.78
Doug Fister
Careerverified
Per 9 Innings
124
0.78
Jack Aker
Career
Per 9 Inningsverified
167
2.01
Doug Fister
Careerverified
Per 9 Innings
186
1.18
Jack Aker
Careerverified
Per 9 Innings
8
0.1
Doug Fister
Career
Per 9 Innings
16
0.1
Jack Aker
Career
Per 9 Inningsverified
240
2.89
Doug Fister
Careerverified
Per 9 Innings
326
2.06
Jack Aker
Career
Per 9 Inningsverified
232
2.8
Doug Fister
Careerverified
Per 9 Innings
310
1.96
Jack Aker
Careerverified
Per 9 Inningsverified
96.67
96.67
Doug Fister
Career
Per 9 Innings
95.09
95.09
Jack Aker
Career
Per 9 Innings
0.469
0.469
Doug Fister
Careerverified
Per 9 Inningsverified
1.281
1.281
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Careerverified
Per 9 Inningsverified
93.39
93.39
Jack Aker
Career
Per 9 Inningsverified
20
0.24
Doug Fister
Career
Per 9 Innings
20
0.13
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Doug Fister
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Doug Fister

Jack Aker
Careerverified
Per 600 PAverified
11
11
Doug Fister
Career
Per 600 PA
10
10
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Doug Fister
Career
Per 600 PA
247
1157.81
Jack Aker
Career
Per 600 PA
104
600
Doug Fister
Careerverified
Per 600 PA
128
600
Jack Aker
Career
Per 600 PAverified
92
530.77
Doug Fister
Careerverified
Per 600 PA
105
492.19
Jack Aker
Career
Per 600 PA
0.076
0.076
Doug Fister
Careerverified
Per 600 PAverified
0.152
0.152
Jack Aker
Career
Per 600 PA
0.279
0.279
Doug Fister
Careerverified
Per 600 PAverified
0.465
0.465
Jack Aker
Career
Per 600 PA
7
40.38
Doug Fister
Careerverified
Per 600 PAverified
16
75
Jack Aker
Career
Per 600 PA
5
28.85
Doug Fister
Careerverified
Per 600 PAverified
13
60.94
Jack Aker
Career
Per 600 PA
2
11.54
Doug Fister
Careerverified
Per 600 PAverified
3
14.06
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
2
11.54
Doug Fister
Careerverified
Per 600 PAverified
3
14.06
Jack Aker
Careerverified
Per 600 PAverified
0.286
0.286
Doug Fister
Career
Per 600 PA
0.188
0.188
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0.81
4.66
Doug Fister
Careerverified
Per 600 PAverified
3.35
15.69
Jack Aker
Career
Per 600 PA
9
51.92
Doug Fister
Careerverified
Per 600 PAverified
19
89.06
Jack Aker
Career
Per 600 PA
9
51.92
Doug Fister
Careerverified
Per 600 PAverified
19
89.06
Jack Aker
Career
Per 600 PA
0.096
0.096
Doug Fister
Careerverified
Per 600 PAverified
0.176
0.176
Jack Aker
Career
Per 600 PA
0.098
0.098
Doug Fister
Careerverified
Per 600 PAverified
0.181
0.181
Jack Aker
Career
Per 600 PA
0.194
0.194
Doug Fister
Careerverified
Per 600 PAverified
0.357
0.357
Jack Aker
Career
Per 600 PA
0.022
0.022
Doug Fister
Careerverified
Per 600 PAverified
0.029
0.029
Jack Aker
Career
Per 600 PA
0.068
0.068
Doug Fister
Careerverified
Per 600 PAverified
0.124
0.124
Jack Aker
Career
Per 600 PA
0.128
0.128
Doug Fister
Careerverified
Per 600 PAverified
0.247
0.247
Jack Aker
Career
Per 600 PA
0.171
0.171
Doug Fister
Careerverified
Per 600 PAverified
0.254
0.254
Jack Aker
Career
Per 600 PA
3
17.31
Doug Fister
Careerverified
Per 600 PAverified
6
28.13
Jack Aker
Career
Per 600 PAverified
4
23.08
Doug Fister
Career
Per 600 PA
4
18.75
Jack Aker
Career
Per 600 PA
7
40.38
Doug Fister
Careerverified
Per 600 PAverified
10
46.88
Jack Aker
Career
Per 600 PA
-4.13
-23.83
Doug Fister
Careerverified
Per 600 PAverified
2.13
9.97
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Doug Fister
Careerverified
Per 600 PAverified
3
14.06
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
51
294.23
Doug Fister
Careerverified
Per 600 PAverified
42
196.88
Jack Aker
Career
Per 600 PA
2.04
2.04
Doug Fister
Careerverified
Per 600 PAverified
3.05
3.05
Jack Aker
Career
Per 600 PA
0.02
0.02
Doug Fister
Careerverified
Per 600 PAverified
0.07
0.07
Jack Aker
Career
Per 600 PA
10
57.69
Doug Fister
Careerverified
Per 600 PAverified
20
93.75
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Doug Fister
Careerverified
Per 600 PAverified
0
0
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Doug Fister
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
Doug Fister
Career
Per 600 PA