28-year old righty reliever Angel Guzman has a significant ligament tear in the front bottom part of his right shoulder. Whether he needs surgery or rehab he is likely going to miss a big chunk of the 2010 season for the Cubs. Guzman pitched in 55 games (0 starts) for the Cubs last season and he was 3-3 with 1 save, a 2.95 ERA and a 1.05 WHIP. Guzman only allowed 41 hits in 61 innings last season for the Cubs as it all finally seemed to come together for him in 2009. This is a bad break for both Guzman and the Cubs.
UPDATE: Guzman has had surgery and he is done for the year.