Jack Aker vs. Jon Lester — Career Comparison

Jack Aker
Silent GenerationCaliforniaThrows RightBats RightNorth AmericaKansas City AthleticsAmerican LeagueRelief Pitcher
Jon Lester
MillenialWashingtonThrows LeftBats LeftNorth AmericaBoston Red SoxAmerican LeagueStarting PitcherAll-Star

Jon Lester 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. Jon Lester led in home run suppression (HR9+ 96 vs 76), run prevention (ERA+ 102 vs 89), and strikeout rate (K%+ 96 vs 86). Jack Aker held the edge in walk avoidance (BB%+ 100 vs 96). Role difference aside, Jon Lester holds a clear edge on every meaningful shared measure.

Pitching Stats for Jack Aker and Jon Lester

Jack Aker
Career
Per 9 Innings
11
11
Jon Lester
Careerverified
Per 9 Inningsverified
16
16
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Jon Lester
Career
Per 9 Innings
452
1.48
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Careerverified
Per 9 Inningsverified
451
1.48
Jack Aker
Career
Per 9 Innings
47
0.57
Jon Lester
Careerverified
Per 9 Inningsverified
200
0.66
Jack Aker
Careerverified
Per 9 Innings
45
0.54
Jon Lester
Career
Per 9 Inningsverified
117
0.38
Jack Aker
Career
Per 9 Innings
51.09
51.09
Jon Lester
Careerverified
Per 9 Inningsverified
63.09
63.09
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Careerverified
Per 9 Inningsverified
99.78
99.78
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Careerverified
Per 9 Inningsverified
15
0.05
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Careerverified
Per 9 Inningsverified
4
0.01
Jack Aker
Careerverified
Per 9 Inningsverified
123
1.48
Jon Lester
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
272
3.28
Jon Lester
Career
Per 9 Innings
1114
3.66
Jack Aker
Careerverified
Per 9 Inningsverified
3.28
3.28
Jon Lester
Career
Per 9 Innings
3.66
3.66
Jack Aker
Careerverified
Per 9 Inningsverified
3.45
3.45
Jon Lester
Career
Per 9 Innings
3.73
3.73
Jack Aker
Career
Per 9 Innings
4.29
4.29
Jon Lester
Careerverified
Per 9 Inningsverified
3.65
3.65
Jack Aker
Careerverified
Per 9 Inningsverified
0.244
0.244
Jon Lester
Career
Per 9 Innings
0.252
0.252
Jack Aker
Career
Per 9 Innings
2238
27
Jon Lester
Careerverified
Per 9 Innings
8220
27
Jack Aker
Career
Per 9 Innings
746
9
Jon Lester
Careerverified
Per 9 Innings
2740
9
Jack Aker
Careerverified
Per 9 Inningsverified
679
8.19
Jon Lester
Career
Per 9 Innings
2610
8.57
Jack Aker
Careerverified
Per 9 Inningsverified
8.19
8.19
Jon Lester
Career
Per 9 Innings
8.57
8.57
Jack Aker
Careerverified
Per 9 Inningsverified
64
0.77
Jon Lester
Career
Per 9 Innings
294
0.97
Jack Aker
Careerverified
Per 9 Inningsverified
0.77
0.77
Jon Lester
Career
Per 9 Innings
0.97
0.97
Jack Aker
Careerverified
Per 9 Inningsverified
0.13
0.13
Jon Lester
Career
Per 9 Innings
0.65
0.65
Jack Aker
Careerverified
Per 9 Innings
274
3.31
Jon Lester
Career
Per 9 Inningsverified
892
2.93
Jack Aker
Career
Per 9 Innings
68
0.82
Jon Lester
Careerverified
Per 9 Inningsverified
13
0.04
Jack Aker
Career
Per 9 Innings
3.31
3.31
Jon Lester
Careerverified
Per 9 Inningsverified
2.93
2.93
Jack Aker
Career
Per 9 Innings
404
4.87
Jon Lester
Careerverified
Per 9 Inningsverified
2488
8.17
Jack Aker
Career
Per 9 Innings
4.87
4.87
Jon Lester
Careerverified
Per 9 Inningsverified
8.17
8.17
Jack Aker
Career
Per 9 Innings
0.82
0.82
Jon Lester
Careerverified
Per 9 Inningsverified
5.5
5.5
Jack Aker
Career
Per 9 Innings
0.909
0.909
Jon Lester
Careerverified
Per 9 Inningsverified
1.234
1.234
Jack Aker
Careerverified
Per 9 Inningsverified
13
0.16
Jon Lester
Career
Per 9 Innings
63
0.21
Jack Aker
Careerverified
Per 9 Innings
40
0.48
Jon Lester
Career
Per 9 Inningsverified
90
0.3
Jack Aker
Careerverified
Per 9 Innings
0
0
Jon Lester
Career
Per 9 Innings
1
0
Jack Aker
Career
Per 9 Inningsverified
3144
37.93
Jon Lester
Careerverified
Per 9 Innings
11487
37.73
Jack Aker
Careerverified
Per 9 Inningsverified
321
3.87
Jon Lester
Career
Per 9 Innings
0
0
Jack Aker
Careerverified
Per 9 Inningsverified
312
3.76
Jon Lester
Career
Per 9 Innings
1215
3.99
Jack Aker
Careerverified
Per 9 Inningsverified
3.76
3.76
Jon Lester
Career
Per 9 Innings
3.99
3.99
Jack Aker
Careerverified
Per 9 Innings
32
0.39
Jon Lester
Career
Per 9 Inningsverified
61
0.2
Jack Aker
Careerverified
Per 9 Inningsverified
12
0.14
Jon Lester
Career
Per 9 Innings
67
0.22
Jack Aker
Career
Per 9 Innings
19
0.23
Jon Lester
Careerverified
Per 9 Inningsverified
250
0.82
Jack Aker
Career
Per 9 Innings
1.278
1.278
Jon Lester
Career
Per 9 Innings
1.278
1.278
Jack Aker
Career
Per 9 Innings
2786
33.61
Jon Lester
Careerverified
Per 9 Inningsverified
10377
34.09
Jack Aker
Careerverified
Per 9 Inningsverified
0.63
0.63
Jon Lester
Career
Per 9 Innings
2.69
2.69
Jack Aker
Careerverified
Per 9 Inningsverified
0.265
0.265
Jon Lester
Career
Per 9 Innings
0.305
0.305
Jack Aker
Careerverified
Per 9 Inningsverified
37.93
37.93
Jon Lester
Career
Per 9 Innings
37.73
37.73

Fielding Stats for Jack Aker and Jon Lester

Jack Aker
Career
Per 9 Innings
11
11
Jon Lester
Careerverified
Per 9 Inningsverified
16
16
Jack Aker
Careerverified
Per 9 Inningsverified
495
5.97
Jon Lester
Career
Per 9 Innings
452
1.48
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Careerverified
Per 9 Inningsverified
451
1.48
Jack Aker
Career
Per 9 Innings
2240
27
Jon Lester
Careerverified
Per 9 Innings
8220
27
Jack Aker
Career
Per 9 Innings
746.2
9
Jon Lester
Careerverified
Per 9 Innings
2740
9
Jack Aker
Career
Per 9 Inningsverified
65
0.78
Jon Lester
Careerverified
Per 9 Innings
147
0.48
Jack Aker
Career
Per 9 Inningsverified
167
2.01
Jon Lester
Careerverified
Per 9 Innings
266
0.87
Jack Aker
Careerverified
Per 9 Innings
8
0.1
Jon Lester
Career
Per 9 Inningsverified
20
0.07
Jack Aker
Career
Per 9 Inningsverified
240
2.89
Jon Lester
Careerverified
Per 9 Innings
433
1.42
Jack Aker
Career
Per 9 Inningsverified
232
2.8
Jon Lester
Careerverified
Per 9 Innings
413
1.36
Jack Aker
Careerverified
Per 9 Inningsverified
96.67
96.67
Jon Lester
Career
Per 9 Innings
95.38
95.38
Jack Aker
Career
Per 9 Innings
0.469
0.469
Jon Lester
Careerverified
Per 9 Inningsverified
0.914
0.914
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Careerverified
Per 9 Inningsverified
99.78
99.78
Jack Aker
Careerverified
Per 9 Inningsverified
20
0.24
Jon Lester
Career
Per 9 Innings
18
0.06
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Career
Per 9 Innings
0
0
Jack Aker
Career
Per 9 Innings
0
0
Jon Lester
Career
Per 9 Innings
0
0

Hitting Stats for Jack Aker and Jon Lester

Jack Aker
Career
Per 600 PA
11
11
Jon Lester
Careerverified
Per 600 PAverified
16
16
Jack Aker
Careerverified
Per 600 PAverified
496
2861.54
Jon Lester
Career
Per 600 PA
458
649.65
Jack Aker
Career
Per 600 PA
104
600
Jon Lester
Careerverified
Per 600 PA
423
600
Jack Aker
Career
Per 600 PAverified
92
530.77
Jon Lester
Careerverified
Per 600 PA
366
519.15
Jack Aker
Career
Per 600 PA
0.076
0.076
Jon Lester
Careerverified
Per 600 PAverified
0.115
0.115
Jack Aker
Career
Per 600 PA
0.279
0.279
Jon Lester
Careerverified
Per 600 PAverified
0.412
0.412
Jack Aker
Career
Per 600 PA
7
40.38
Jon Lester
Careerverified
Per 600 PAverified
42
59.57
Jack Aker
Career
Per 600 PA
5
28.85
Jon Lester
Careerverified
Per 600 PAverified
28
39.72
Jack Aker
Career
Per 600 PA
2
11.54
Jon Lester
Careerverified
Per 600 PAverified
10
14.18
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Careerverified
Per 600 PAverified
4
5.67
Jack Aker
Career
Per 600 PA
2
11.54
Jon Lester
Careerverified
Per 600 PAverified
14
19.86
Jack Aker
Career
Per 600 PA
0.286
0.286
Jon Lester
Careerverified
Per 600 PAverified
0.333
0.333
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Careerverified
Per 600 PAverified
0.011
0.011
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Careerverified
Per 600 PAverified
0.095
0.095
Jack Aker
Career
Per 600 PA
0.81
4.66
Jon Lester
Careerverified
Per 600 PAverified
12.43
17.63
Jack Aker
Career
Per 600 PA
9
51.92
Jon Lester
Careerverified
Per 600 PAverified
64
90.78
Jack Aker
Career
Per 600 PA
9
51.92
Jon Lester
Careerverified
Per 600 PAverified
63
89.36
Jack Aker
Career
Per 600 PA
0.096
0.096
Jon Lester
Careerverified
Per 600 PAverified
0.162
0.162
Jack Aker
Career
Per 600 PA
0.098
0.098
Jon Lester
Careerverified
Per 600 PAverified
0.175
0.175
Jack Aker
Career
Per 600 PA
0.194
0.194
Jon Lester
Careerverified
Per 600 PAverified
0.337
0.337
Jack Aker
Career
Per 600 PA
0.022
0.022
Jon Lester
Careerverified
Per 600 PAverified
0.06
0.06
Jack Aker
Career
Per 600 PA
0.068
0.068
Jon Lester
Careerverified
Per 600 PAverified
0.117
0.117
Jack Aker
Career
Per 600 PA
0.128
0.128
Jon Lester
Careerverified
Per 600 PAverified
0.261
0.261
Jack Aker
Career
Per 600 PA
0.171
0.171
Jon Lester
Careerverified
Per 600 PAverified
0.188
0.188
Jack Aker
Career
Per 600 PA
3
17.31
Jon Lester
Careerverified
Per 600 PAverified
27
38.3
Jack Aker
Career
Per 600 PA
4
23.08
Jon Lester
Careerverified
Per 600 PAverified
31
43.97
Jack Aker
Career
Per 600 PA
7
40.38
Jon Lester
Careerverified
Per 600 PAverified
54
76.6
Jack Aker
Career
Per 600 PA
-4.13
-23.83
Jon Lester
Careerverified
Per 600 PAverified
0.54
0.76
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Jon Lester
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
1
5.77
Jon Lester
Careerverified
Per 600 PAverified
21
29.79
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Career
Per 600 PA
0
0
Jack Aker
Careerverified
Per 600 PA
51
294.23
Jon Lester
Career
Per 600 PAverified
162
229.79
Jack Aker
Career
Per 600 PA
2.04
2.04
Jon Lester
Careerverified
Per 600 PAverified
2.61
2.61
Jack Aker
Career
Per 600 PA
0.02
0.02
Jon Lester
Careerverified
Per 600 PAverified
0.13
0.13
Jack Aker
Career
Per 600 PAverified
10
57.69
Jon Lester
Careerverified
Per 600 PA
34
48.23
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Careerverified
Per 600 PAverified
2
2.84
Jack Aker
Careerverified
Per 600 PAverified
1
5.77
Jon Lester
Career
Per 600 PA
6
8.51
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Careerverified
Per 600 PAverified
1
1.42
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Career
Per 600 PA
0
0
Jack Aker
Career
Per 600 PA
0
0
Jon Lester
Careerverified
Per 600 PAverified
1
1.42
Jack Aker
Career
Per 600 PA
Jon Lester
Careerverified
Per 600 PAverified
100
100