Posted by ESPN.com's Matt Mosley
On the first day the Philadelphia Eagles strapped on the pads, starting left cornerback Asante Samuel had to leave practice with a hamstring injury. Samuel did not practice in the afternoon and he's scheduled to undergo an MRI on Sunday.
Last month, he strained his left hamstring during workouts. Head coach Andy Reid said that Samuel, who suffered the injury during a 7-on-7 drill, felt better after practice. You'll usually see a rash of muscle strains early in camp because players have had a few weeks off. But this is also one of the main reasons the Eagles didn't want to part with Lito Sheppard. With a lot of teams lining up three and four receivers, you have to have depth. And you don't want one injury to hold an entire team hostage.
When my ESPN colleague Darren Woodson couldn't play because of a back injury in 2004, it had a huge impact on the Cowboys' defense. A hamstring injury is something that can linger for an entire season because players don't have time to properly rest. It wouldn't surprise me if Samuel sat out a week of practices.
More details to come.