What seemed like a routine slide into second base turned into a major injury for Vernon Wells, who will undergo surgery Tuesday to repair a torn ligament in his right thumb, a procedure that will sideline the Angels left fielder for eight to 10 weeks.

"He thought it popped out and back in — that happens a lot, and guys usually work through it," Manager Mike Scioscia said of Wells, who was injured in the second inning of Sunday's 3-2 loss to San Diego. "But the next inning, there was no chance of him swinging a bat, and we knew it was significant."

Wells was batting .244 with six homers and 12 runs batted in, but he seemed to find his stroke last week with eight hits, including two homers and four RBIs in 23 at-bats.

"He was taking some walks, getting into better counts and putting better swings on the ball," Scioscia said. "Any time you lose a guy who is showing some signs he's getting back into his game, it's unfortunate. But you have to have depth."