Sure I'm concerned. He hasn't had an "easy" inning since his first outing with the Twins. Too many walks, hits and hard contact. That said, if he wasn't just acquired, it would look like a blip on the screen. Some of the hits were soft contact (I remember especially his first blown save) and his history as a bullpen arm features good control as well.
I'll be anxious when he comes in for a save the next time and probably many more next times. He's had an outstanding season and has really good stuff, but hasn't pitched like that for my favorite team.