Actually he gave up 2 earned runs in 5.1 innings on 84 pitches. 6 hits, 2 BB's 4 K's. His last four starts before tonight he went 6.1, 3.1, 5.1 and 5.1 innings. That is pretty terrible.
He actually got into the 7th inning, pitching 6.1 on July 6th. But that was not really that good a start and it has been all downhill from there. Before that, he had a decent smattering of games where he went a full 7 innings or 6 plus and that was the norm. He went 5.1 again on June 30th but has not really sniffed the 7th inning or even 6 complete since that July 6th start.
It has been such a precipitous slide that I would not rule out injury.