The Giants are worried that catcher Buster Posey is compromising not only his offensive potential but his long-term health by playing such a demanding, dangerous position. Posey doesn't appear to agree with those that worry. "Since I have been catching, it seems like you kind of go through periods where you just get beat up a little bit," Posey said. "And then there are periods where you don't get beat up at all. It's just one of those things that you go through." Posey took two foul balls off his mask in a game against Arizona on May 11 that had potential concussive implications, though it was deemed he didn't suffer a concussion. A few days later, he took another stinging foul off his upper thigh, and he has generally taken more than his share of dings in 2011, including two to his throwing shoulder. "He's taken more than I've ever seen," said manager Bruce Bochy. "He's getting enough shots that are hitting him pretty good that I've got concern." The Giants are particularly sensitive to such injuries after a series of foul tips in 2006 effectively ended the career of Gold Glove catcher Mike Matheny after he signed with the team as a free agent in 2005.