I know this isn't a real category anymore but I remember it from my youth. And Hader had a season for the ages.
0-0, 37 saves, 0.56 ERA
64.1 innings, 25 hits, 4 runs (0 unearned), 19 walks, 103 K's, 1 HR allowed.
You want more? Ok...
.117/.191/.159 slashed against
a TOTAL of 7 extra base hits allowed (6 doubles, 1 HR)
0.68 WHIP
1 SB allowed
I mean the worst thing you could probably say is that he didn't catch anyone stealing. But since no one was ever really on base that kind of limits the opportunities.
I’m glad we have a Reliever of the Year category. Wish MLB would. As I said in the other thread, I do not believe a reliever is as valuable as an ace starter, but a dominant reliever/bullpen can significantly impact a game and how it is managed.