A few interesting stats

So, the Cubs starter tonight managed to throw 99 pitches. Not that spectacular. He threw more groundballs than the Cubs scored runs. Not that spectacular. Oh wait, the started pitched all 9 innings--99 pitches is really good. Oh wait, the Cubs scored 14 runs, so more groundballs than runs is really good. Oh yeah, the wind was blowing out at Wrigley, and he didn't allow a runner past second base all game. And, just for kicks, he went 2-4 with a run. This follows a 7-inning, 0-run outing at Wrigley with the wind blowing out last weekend in which he had the game-winning RBI.
So, Sergio Mitre has had a nice little run of outings. By the way, did I mention that he's the Cubs #7 starter? That's right, ladies and gentlemen, the Cubs started the season with 5 starters, moved one of them to closer and added a new starter to the rotation. Only after Wood got hurt later on did they call up Mitre. So, assuming Wood and Prior come back from the DL healthy soon, how can you send Mitre back to the minors?