Mathis, who is expected to miss four to six weeks with the injury, had his hand examined on Tuesday by team physician Lewis Yocum and the injury was announced in the press box about 90 minutes before the Angels' game against the Tigers. The Angels also announced they recalled utility man Robb Quinlan from Triple-A Salt Lake to take Mathis' place on the 25-man roster.
"It's frustrating, it's upsetting, but it's part of the game," Mathis said. "It's a bad break, didn't go my way."
Angels manager Mike Scioscia talked about Mathis' injury before the roster move was announced, but said he watched the replay of the incident and that Mathis' hand was sore on Tuesday.
"I saw the replay and his hand wasn't really in the position it needed to be -- it needed to be behind the glove," Scioscia said. "Jeff blocks the ball as well as anybody in baseball, so it was just a freak thing that his hand was there and in position where it usually isn't."
The injury couldn't have come at a tougher time for Mathis, who is off to his best offensive start of his career. The 27-year-old was batting .324 and had a hit in all 10 of his starts this season.
With Mathis on the DL, it means more playing time for Mike Napoli, who hit 20 home runs in both 2008 and 2009, but has made just four starts this season because of Mathis' hot start. The Angels also didn't need to recall another catcher with third catcher Bobby Wilson on the active roster.