Astros' Luis Baez: Undergoes surgery

Baez underwent surgery on his left thumb Wednesday, Brian McTaggart of MLB.com reports.

Baez has been held out of action at Double-A Corpus Christi since the end of August due to his injured thumb, and the procedure will officially put an early end to his second year of professional baseball. The 20-year-old outfield prospect slashed .258/.301/.462 with 21 homers and 76 RBI across 468 plate appearances between High-A and Double-A, and he's expected to be ready to go for the start of next season.