Reddick's injury may stem from crashing into a wall chasing a foul ball back on April 7 against the Astros, reports the San Francisco Chronicle. It has been bothering him recently despite receiving regular treatments for the injury.
The outfielder broke out with big power numbers in 2012, hitting 32 homers after being traded from the Red Sox to Oakland in the offseason. This season he has not looked comfortable at the plate at all, hitting .152 with a .266 OBP and just one home run in 29 games. Since his wall collision, Reddick has posted a .510 OPS.
The rumor going around is that a friendly face could take Reddick's spot on the roster. Daric Barton was once the starting first baseman in Oakland, getting on base at a .393 clip in 2010. His playing time fell the last two seasons, however, and he has been playing for Triple-A Sacramento this season. He has been hitting well with an .887 OPS through his first 29 games. Barton has played some third base and catcher in the minors, but has not seen significant time in the outfield. He is likely limited to first base in the majors, though he is an excellent defensive player at the position.
The Athletics already have two outfielders, Chris Young and Coco Crisp, on the disabled list. Both players will first be eligible to return in a week.