Cron will need six to eight weeks of recovery time, the Angels announced Tuesday.
After experiencing moderate pain recently, Cron had an examination by Dr. Steve Shin, who decided to perform an arthroscopic debridement at the base of his thumb.
Cron should be fine for spring training.
The first baseman and designated hitter batted .278 with 16 homers and 69 RBIs in 116 games last season, setting personal bests in almost every statistical category during his third year in the majors. He missed six weeks of the season after his left hand was broken when he was hit by a pitch.