But back to Miley, I really think his quick pace is a double-edged sword. When he's going good, it keeps his momentum going, but once things start going bad, specifically with missing his spots, his quick pace just causes him to unravel at light speed.
Cliche as all this may sound, I think there would be real benefit from him taking a breather between pitches and pressing the reset button. Haven't seen Miley's two bad starts, but if the Sox aren't using mound visits by the catcher to help with this, they should start, at least as much as the umpire will allow.
Pitchers should have the mindset that each individual pitch is its own event. The only pitch that matters is the next one thrown. I don't know what Miley's thinking, but to me it seems like he's getting into a bad spot, then rather than saying "I'm going to throw this pitch to this location" he's saying "I'm going to throw this pitch in the direction of the catcher".