100 pitches certainly isn't that high of a number. In fact, it's pretty standard. He threw 109 and 116 pitches in his 2nd and 3rd start of the season. I don't think that's very typical nor a good idea. I think it matters more how stressful those pitches are, and I don't think Sheets have been. If I had to guess (and that's all it really is), I'd say that his start against the Mets ended with some pretty "stressful pitches". First of all, overall, his velocity was down in his third start compared to his first two starts (he only averaged 91.2 MPH, compared to 92.4 and 94.5). But look at how his velocities finished up during that third start: http://i14.photobucket.com/albums/a345/rluzinski/fastball_vel_0412.jpg It seems to me that Sheets started to fatigue around 6th or 7th, as you would expect. But after he gave up that HR to Wright in the 8th, it looks like he tried to reach back to get a little extra against the next batter, Beltran. 5 of the 7 pitches he threw to him that AB (which ended in a walk) were fastballs and the last fastball almost matched his high for the game. I'm probably looking into this too much but don't forget that Sheets reported first feeling discomfort during this game. I guess I don't want any starting pitcher to give a 105% in an April start. The pitch counts themselves probably had little or nothing to do with the injury. I still don't think it was a good idea, however.