Mason Might Miss Camp, Says He'll Make Opener

New center Matt Birk, 32, was one of the few veterans to practice Sunday. Most took advantage of Harbaugh's 30-plus rule (he gives players over the age of 30 every third day off). "I noticed Matt Birk decided to [practice]," Harbaugh said. "He was 29 today." ... Starting left guard Ben Grubbs sat out the minicamp after offseason ankle surgery. Left tackle Jared Gaither missed Sunday with migraines, tight end L.J. Smith was out with a groin injury and cornerback Lardarius Webb, a third-round pick, sat with a tight left hamstring. ... The quarterbacks performed an unusual individual drill. After having the ball flipped to him, each quarterback tossed the ball left-handed. Most of the throws - which were intended to go 10 yards - were way off mark. ... Though Sunday was the final day of mandatory camp, Harbaugh expects a strong showing for other offseason camps, which run through mid-June. "We want everybody here every day," he said. "That's what we're pushing for. Guys will have issues where they won't be able to be here every day, but I know all the guys will make every effort to be here every day."

Baltimore Sun reporter Ken Murray contributed to this article.