I added this up myself, but I think I'm right. On 9/11 and 9/14 of last season, Kelvin Herrera gave up 3 ER in back to back appearances. I like to think he was still recovering from chicken pox.
Since 9/14, including postseason:
23 appearances
24 2/3 innings
2 Earned Runs
34 strikeouts
ERA of 0.72