Rolla Mapel vs. Willis Roberts — Career Comparison

Lost GenerationMissouriThrows LeftBats LeftNorth AmericaSt. Louis BrownsAmerican LeagueStarting Pitcher
Gen XD.R.Throws RightBats RightCaribbeanBaltimore OriolesAmerican LeagueRelief Pitcher

Rolla Mapel built a career as a starting pitcher and Willis Roberts as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rolla Mapel posted stronger surface numbers — ERA 4.5 and WHIP 1.700 compared to 4.64 and 1.521 for Willis Roberts. By the career numbers, Rolla Mapel had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Rolla Mapel and Willis Roberts

Rolla Mapel
Career
Per 9 Innings
1
1
Willis Roberts
Careerverified
Per 9 Inningsverified
5
5
Rolla Mapel
Career
Per 9 Innings
4
1.8
Willis Roberts
Careerverified
Per 9 Inningsverified
148
5.13
Rolla Mapel
Career
Per 9 Inningsverified
3
1.35
Willis Roberts
Careerverified
Per 9 Innings
18
0.62
Rolla Mapel
Career
Per 9 Innings
0
0
Willis Roberts
Careerverified
Per 9 Inningsverified
17
0.59
Rolla Mapel
Careerverified
Per 9 Innings
3
1.35
Willis Roberts
Career
Per 9 Inningsverified
15
0.52
Rolla Mapel
Career
Per 9 Innings
0
0
Willis Roberts
Careerverified
Per 9 Inningsverified
53.13
53.13
Rolla Mapel
Careerverified
Per 9 Inningsverified
75
75
Willis Roberts
Career
Per 9 Innings
12.16
12.16
Rolla Mapel
Careerverified
Per 9 Inningsverified
2
0.9
Willis Roberts
Career
Per 9 Innings
1
0.03
Rolla Mapel
Career
Per 9 Innings
0
0
Willis Roberts
Career
Per 9 Innings
0
0
Rolla Mapel
Career
Per 9 Innings
0
0
Willis Roberts
Careerverified
Per 9 Inningsverified
7
0.24
Rolla Mapel
Careerverified
Per 9 Inningsverified
10
4.5
Willis Roberts
Career
Per 9 Innings
134
4.64
Rolla Mapel
Careerverified
Per 9 Inningsverified
4.5
4.5
Willis Roberts
Career
Per 9 Innings
4.64
4.64
Rolla Mapel
Career
Per 9 Innings
5.35
5.35
Willis Roberts
Careerverified
Per 9 Inningsverified
4.97
4.97
Rolla Mapel
Career
Per 9 Innings
5.8
5.8
Willis Roberts
Careerverified
Per 9 Inningsverified
4.56
4.56
Rolla Mapel
Careerverified
Per 9 Inningsverified
0.262
0.262
Willis Roberts
Career
Per 9 Innings
0.274
0.274
Rolla Mapel
Career
Per 9 Innings
60
27
Willis Roberts
Careerverified
Per 9 Innings
779
27
Rolla Mapel
Career
Per 9 Innings
20
9
Willis Roberts
Careerverified
Per 9 Innings
259.2
9
Rolla Mapel
Careerverified
Per 9 Inningsverified
17
7.65
Willis Roberts
Career
Per 9 Innings
277
9.6
Rolla Mapel
Careerverified
Per 9 Inningsverified
7.65
7.65
Willis Roberts
Career
Per 9 Innings
9.6
9.6
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
27
0.94
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
0.94
0.94
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
0.18
0.18
Rolla Mapel
Careerverified
Per 9 Innings
17
7.65
Willis Roberts
Career
Per 9 Inningsverified
112
3.88
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
6
0.21
Rolla Mapel
Career
Per 9 Innings
7.65
7.65
Willis Roberts
Careerverified
Per 9 Inningsverified
3.88
3.88
Rolla Mapel
Career
Per 9 Innings
2
0.9
Willis Roberts
Careerverified
Per 9 Inningsverified
179
6.2
Rolla Mapel
Career
Per 9 Innings
0.9
0.9
Willis Roberts
Careerverified
Per 9 Inningsverified
6.2
6.2
Rolla Mapel
Career
Per 9 Innings
0.5
0.5
Willis Roberts
Careerverified
Per 9 Inningsverified
1.21
1.21
Rolla Mapel
Career
Per 9 Innings
0.95
0.95
Willis Roberts
Careerverified
Per 9 Inningsverified
1.121
1.121
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
13
0.45
Rolla Mapel
Careerverified
Per 9 Innings
3
1.35
Willis Roberts
Career
Per 9 Inningsverified
25
0.87
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
2
0.07
Rolla Mapel
Career
Per 9 Innings
85
38.25
Willis Roberts
Careerverified
Per 9 Inningsverified
1165
40.38
Rolla Mapel
Career
Per 9 Innings
1
0.45
Willis Roberts
Careerverified
Per 9 Inningsverified
54
1.87
Rolla Mapel
Careerverified
Per 9 Innings
12
5.4
Willis Roberts
Career
Per 9 Inningsverified
146
5.06
Rolla Mapel
Career
Per 9 Innings
5.4
5.4
Willis Roberts
Careerverified
Per 9 Inningsverified
5.06
5.06
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
7
0.24
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
0
Willis Roberts
Career
Per 9 Innings
11
0.38
Rolla Mapel
Career
Per 9 Innings
0
0
Willis Roberts
Careerverified
Per 9 Inningsverified
21
0.73
Rolla Mapel
Career
Per 9 Innings
1.7
1.7
Willis Roberts
Careerverified
Per 9 Inningsverified
1.498
1.498
Rolla Mapel
Career
Per 9 Innings
65
29.25
Willis Roberts
Careerverified
Per 9 Inningsverified
1010
35.01
Rolla Mapel
Career
Per 9 Innings
3
3
Willis Roberts
Careerverified
Per 9 Inningsverified
0.99
0.99
Rolla Mapel
Careerverified
Per 9 Inningsverified
0.27
0.27
Willis Roberts
Career
Per 9 Innings
0.311
0.311
Rolla Mapel
Career
Per 9 Innings
38.25
38.25
Willis Roberts
Careerverified
Per 9 Inningsverified
40.38
40.38

Fielding Stats for Rolla Mapel and Willis Roberts

Rolla Mapel
Career
Per 9 Innings
1
Willis Roberts
Careerverified
Per 9 Inningsverified
5
5
Rolla Mapel
Career
Per 9 Innings
4
Willis Roberts
Careerverified
Per 9 Inningsverified
148
5.13
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Careerverified
Per 9 Inningsverified
18
0.62
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Careerverified
Per 9 Inningsverified
779
27
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Careerverified
Per 9 Inningsverified
259.2
9
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Careerverified
Per 9 Inningsverified
15
0.52
Rolla Mapel
Career
Per 9 Innings
11
Willis Roberts
Careerverified
Per 9 Inningsverified
39
1.35
Rolla Mapel
Careerverified
Per 9 Inningsverified
0
Willis Roberts
Career
Per 9 Innings
5
0.17
Rolla Mapel
Career
Per 9 Innings
11
Willis Roberts
Careerverified
Per 9 Inningsverified
59
2.04
Rolla Mapel
Career
Per 9 Innings
11
Willis Roberts
Careerverified
Per 9 Inningsverified
54
1.87
Rolla Mapel
Careerverified
Per 9 Innings
100
Willis Roberts
Career
Per 9 Inningsverified
91.53
91.53
Rolla Mapel
Careerverified
Per 9 Innings
2.75
Willis Roberts
Career
Per 9 Inningsverified
0.365
0.365
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Careerverified
Per 9 Inningsverified
12.16
12.16
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Careerverified
Per 9 Inningsverified
1
0.03
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Career
Per 9 Innings
0
0
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Career
Per 9 Innings
0
0
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Career
Per 9 Innings
0
0
Rolla Mapel
Career
Per 9 Innings
0
Willis Roberts
Career
Per 9 Innings
0
0

Hitting Stats for Rolla Mapel and Willis Roberts

Rolla Mapel
Career
Per 600 PA
1
1
Willis Roberts
Careerverified
Per 600 PAverified
5
5
Rolla Mapel
Career
Per 600 PA
4
400
Willis Roberts
Careerverified
Per 600 PAverified
148
14800
Rolla Mapel
Career
Per 600 PA
6
600
Willis Roberts
Career
Per 600 PA
6
600
Rolla Mapel
Careerverified
Per 600 PAverified
6
600
Willis Roberts
Career
Per 600 PA
5
500
Rolla Mapel
Career
Per 600 PA
0.167
0.167
Willis Roberts
Careerverified
Per 600 PAverified
0.2
0.2
Rolla Mapel
Career
Per 600 PA
0.333
0.333
Willis Roberts
Careerverified
Per 600 PAverified
0.5
0.5
Rolla Mapel
Career
Per 600 PA
1
100
Willis Roberts
Career
Per 600 PA
1
100
Rolla Mapel
Career
Per 600 PA
1
100
Willis Roberts
Career
Per 600 PA
1
100
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0.15
14.97
Willis Roberts
Careerverified
Per 600 PAverified
0.18
18.03
Rolla Mapel
Career
Per 600 PA
1
100
Willis Roberts
Career
Per 600 PA
1
100
Rolla Mapel
Career
Per 600 PA
1
100
Willis Roberts
Career
Per 600 PA
1
100
Rolla Mapel
Career
Per 600 PA
0.167
0.167
Willis Roberts
Careerverified
Per 600 PAverified
0.2
0.2
Rolla Mapel
Career
Per 600 PA
0.167
0.167
Willis Roberts
Careerverified
Per 600 PAverified
0.2
0.2
Rolla Mapel
Career
Per 600 PA
0.333
0.333
Willis Roberts
Careerverified
Per 600 PAverified
0.4
0.4
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0.117
0.117
Willis Roberts
Careerverified
Per 600 PAverified
0.14
0.14
Rolla Mapel
Career
Per 600 PA
0.2
0.2
Willis Roberts
Careerverified
Per 600 PAverified
0.25
0.25
Rolla Mapel
Career
Per 600 PA
0.5
0.5
Willis Roberts
Careerverified
Per 600 PAverified
1
1
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0.04
4.42
Willis Roberts
Careerverified
Per 600 PAverified
0.18
18.45
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
4
400
Willis Roberts
Career
Per 600 PA
4
400
Rolla Mapel
Career
Per 600 PA
1.5
1.5
Willis Roberts
Career
Per 600 PA
1.5
1.5
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Careerverified
Per 600 PAverified
1
100
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
0
0
Willis Roberts
Career
Per 600 PA
0
0
Rolla Mapel
Career
Per 600 PA
Willis Roberts
Career
Per 600 PA