So word around (Bob Brenly and other analysts) is that Arroyo's success is because the NL hasn't seen him--just wait they say, and Arroyo will come back to career norms. My response to that is:
1) Arroyo is not a fastballer who hitters need to get their timing on, or a junk pitcher who hitters need to get their timing on- he throws a fastball at three arm angles, he throws a nasty curve at three arm angles, and a changeup. He has basically seven pitches. And he uses them smartly and is able to change tactics and adjust mid-game. He's a smart pitcher with a lot of variety in his arsenal. No matter how many times you see him.
2) I don't think at 29 you have met the final definition of who you are as a pitcher. At 32 you have, but I still think there's some upcurve left in Arroyo's talent being realized.
The Red Sox must be kicking themselves.