A likely scenario is that Sheets was making an effort to throw at his current comfort level, say 85%. The fact is that any major league pitcher who is throwing at less than 90% of his velocity is going to get shelled, like Sheets was getting in the first inning. Sheets' pride probably took over for a batter or two and he turned it up a notch. He may have suffered a very, very minor "irritation", and then the light bulb clicked on, and he realized "what the hell am I doing" and took himself out of the game. I'd be very surprised if anything that happened today would constitute a major setback. Sheets is too smart to let anything like that happen. If anything, they'll just push the timetable back a little, like they should have all along. My best guess is that Ben will work on the side, be back on the mound for an inning in about 10 days, then start making progress toward being on the mound in Milwaukee in late April. We'll have to live with a few starts from our sixth starter, Dave Bush, who will probably win each of those starts.