Jack Armstrong vs. Matt Duff — Career Comparison

Jack Armstrong
Gen XNew JerseyThrows RightBats RightNorth AmericaCincinnati RedsNational LeagueStarting PitcherAll-Star
Matt Duff
Gen XMississippiThrows RightBats RightNorth AmericaSt. Louis CardinalsNational LeagueRelief Pitcher

Jack Armstrong built a career as a starting pitcher and Matt Duff as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Armstrong posted stronger surface numbers — ERA 4.58 and WHIP 1.458 compared to 4.76 and 2.294 for Matt Duff. By the career numbers, Jack Armstrong had the better of this cross-role comparison — though era context would sharpen the verdict.

Pitching Stats for Jack Armstrong and Matt Duff

Jack Armstrong
Careerverified
Per 9 Inningsverified
7
7
Matt Duff
Career
Per 9 Innings
1
1
Jack Armstrong
Careerverified
Per 9 Innings
152
1.74
Matt Duff
Career
Per 9 Inningsverified
7
11.12
Jack Armstrong
Careerverified
Per 9 Inningsverified
130
1.49
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
40
0.46
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
65
0.74
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
38.1
38.1
Matt Duff
Career
Per 9 Innings
Jack Armstrong
Careerverified
Per 9 Inningsverified
85.53
85.53
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
4
0.05
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
1
0.01
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Inningsverified
400
4.58
Matt Duff
Careerverified
Per 9 Innings
3
4.76
Jack Armstrong
Careerverified
Per 9 Inningsverified
4.58
4.58
Matt Duff
Career
Per 9 Innings
4.76
4.76
Jack Armstrong
Career
Per 9 Innings
4.48
4.48
Matt Duff
Careerverified
Per 9 Inningsverified
3.63
3.63
Jack Armstrong
Careerverified
Per 9 Inningsverified
4.67
4.67
Matt Duff
Career
Per 9 Innings
5.82
5.82
Jack Armstrong
Career
Per 9 Innings
0.265
0.265
Matt Duff
Careerverified
Per 9 Inningsverified
0.15
0.15
Jack Armstrong
Careerverified
Per 9 Innings
2360
27
Matt Duff
Career
Per 9 Innings
17
27
Jack Armstrong
Careerverified
Per 9 Innings
786.2
9
Matt Duff
Career
Per 9 Innings
5.2
9
Jack Armstrong
Career
Per 9 Innings
807
9.23
Matt Duff
Careerverified
Per 9 Inningsverified
3
4.76
Jack Armstrong
Career
Per 9 Innings
9.23
9.23
Matt Duff
Careerverified
Per 9 Inningsverified
4.76
4.76
Jack Armstrong
Career
Per 9 Innings
102
1.17
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Innings
1.17
1.17
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Innings
0.67
0.67
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Inningsverified
319
3.65
Matt Duff
Careerverified
Per 9 Innings
8
12.71
Jack Armstrong
Career
Per 9 Inningsverified
21
0.24
Matt Duff
Careerverified
Per 9 Innings
2
3.18
Jack Armstrong
Careerverified
Per 9 Inningsverified
3.65
3.65
Matt Duff
Career
Per 9 Innings
12.71
12.71
Jack Armstrong
Careerverified
Per 9 Innings
510
5.83
Matt Duff
Career
Per 9 Inningsverified
4
6.35
Jack Armstrong
Career
Per 9 Innings
5.83
5.83
Matt Duff
Careerverified
Per 9 Inningsverified
6.35
6.35
Jack Armstrong
Careerverified
Per 9 Inningsverified
3.36
3.36
Matt Duff
Career
Per 9 Innings
0.57
0.57
Jack Armstrong
Career
Per 9 Innings
1.054
1.054
Matt Duff
Careerverified
Per 9 Inningsverified
2.118
2.118
Jack Armstrong
Career
Per 9 Innings
26
0.3
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Innings
18
0.21
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Innings
13
0.15
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Careerverified
Per 9 Innings
3450
39.47
Matt Duff
Career
Per 9 Inningsverified
28
44.47
Jack Armstrong
Careerverified
Per 9 Innings
10
0.11
Matt Duff
Career
Per 9 Inningsverified
1
1.59
Jack Armstrong
Career
Per 9 Innings
439
5.02
Matt Duff
Careerverified
Per 9 Inningsverified
3
4.76
Jack Armstrong
Career
Per 9 Innings
5.02
5.02
Matt Duff
Careerverified
Per 9 Inningsverified
4.76
4.76
Jack Armstrong
Career
Per 9 Innings
34
0.39
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Career
Per 9 Innings
35
0.4
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
37
0.42
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
1.431
1.431
Matt Duff
Career
Per 9 Innings
1.941
1.941
Jack Armstrong
Careerverified
Per 9 Inningsverified
3044
34.83
Matt Duff
Career
Per 9 Innings
20
31.76
Jack Armstrong
Career
Per 9 Innings
2.89
2.89
Matt Duff
Careerverified
Per 9 Inningsverified
0.43
0.43
Jack Armstrong
Career
Per 9 Innings
0.29
0.29
Matt Duff
Careerverified
Per 9 Inningsverified
0.188
0.188
Jack Armstrong
Career
Per 9 Innings
39.47
39.47
Matt Duff
Careerverified
Per 9 Inningsverified
44.47
44.47

Fielding Stats for Jack Armstrong and Matt Duff

Jack Armstrong
Careerverified
Per 9 Inningsverified
7
7
Matt Duff
Career
Per 9 Innings
1
1
Jack Armstrong
Careerverified
Per 9 Innings
152
1.74
Matt Duff
Career
Per 9 Inningsverified
7
11.12
Jack Armstrong
Careerverified
Per 9 Inningsverified
130
1.49
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Innings
2360
27
Matt Duff
Career
Per 9 Innings
17
27
Jack Armstrong
Careerverified
Per 9 Innings
786.2
9
Matt Duff
Career
Per 9 Innings
5.2
9
Jack Armstrong
Careerverified
Per 9 Inningsverified
62
0.71
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Innings
111
1.27
Matt Duff
Career
Per 9 Inningsverified
1
1.59
Jack Armstrong
Career
Per 9 Innings
8
0.09
Matt Duff
Careerverified
Per 9 Inningsverified
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
181
2.07
Matt Duff
Career
Per 9 Innings
1
1.59
Jack Armstrong
Careerverified
Per 9 Inningsverified
173
1.98
Matt Duff
Career
Per 9 Innings
1
1.59
Jack Armstrong
Career
Per 9 Innings
95.58
95.58
Matt Duff
Careerverified
Per 9 Inningsverified
100
100
Jack Armstrong
Careerverified
Per 9 Inningsverified
1.138
1.138
Matt Duff
Career
Per 9 Innings
0.143
0.143
Jack Armstrong
Careerverified
Per 9 Inningsverified
85.53
85.53
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Careerverified
Per 9 Inningsverified
5
0.06
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Matt Duff
Career
Per 9 Innings
0
0
Jack Armstrong
Career
Per 9 Innings
0
0
Matt Duff
Career
Per 9 Innings
0
0

Hitting Stats for Jack Armstrong and Matt Duff

Jack Armstrong
Careerverified
Per 600 PAverified
7
7
Matt Duff
Career
Per 600 PA
1
Jack Armstrong
Careerverified
Per 600 PAverified
153
426.98
Matt Duff
Career
Per 600 PA
7
Jack Armstrong
Careerverified
Per 600 PAverified
215
600
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
185
516.28
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
0.114
0.114
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.354
0.354
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
21
58.6
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
19
53.02
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
2
5.58
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
2
5.58
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
0.095
0.095
Matt Duff
Career
Per 600 PA
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
2.16
6.02
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
23
64.19
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
25
69.77
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
0.132
0.132
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.124
0.124
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.257
0.257
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.011
0.011
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.091
0.091
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.159
0.159
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.206
0.206
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
8
22.33
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
8
22.33
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
16
44.65
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
-4.73
-13.19
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
2
5.58
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Careerverified
Per 600 PAverified
2
5.58
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
83
231.63
Matt Duff
Careerverified
Per 600 PAverified
0
Jack Armstrong
Careerverified
Per 600 PAverified
2.59
2.59
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
0.02
0.02
Matt Duff
Career
Per 600 PA
Jack Armstrong
Careerverified
Per 600 PAverified
26
72.56
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
6
16.74
Matt Duff
Careerverified
Per 600 PAverified
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
0
0
Matt Duff
Career
Per 600 PA
0
Jack Armstrong
Career
Per 600 PA
Matt Duff
Career
Per 600 PA