Boof goes poof

Scratch Boof Bonser's name from the starting lineup, and perhaps even from the Twins' setup role this season. He's undergoing shoulder surgery and could be out months.

The decision to have surgery comes after Bonser had two MRI exams and a cortisone shot since the end of last season. The exams showed no structural damage, and the cortisone shot, given a few days before Bonser reported to camp, yielded minimal results.

The surgery will be performed by Tampa Bay Rays team physician Dr. Koco Eaton in St. Petersburg.

"They're going to go in and clean up," Twins manager Ron Gardenhire said. "They know that there's a little small spur that's part of the problem. ... There's no timetable right now because first you have to see exactly what happens in the surgery and what else they find. They'll check everything out as they go through it, in a scope fashion."

Bonser's already damaged fantasy value just hit the floor. What happened to this high-end prospect?