Kinda wild. I had noticed his record when I was looking something up on him last week. ERA currently is 3.49
Was looking at some other unlikely W/L records of relievers:
Brach was 10-4 in '16 / 2.04 ERA
O'Day was 7-1 in '12 / 2.28 ERA
As for as W/L, Baumann may likely eclipse theirs with win pct., though his ERA is not close, for now.