DeMarco Murray sits out practice with a “hamstring tweak”

AP

Any time football players get on the field, there’s a chance of injury.

That includes offseason workouts and OTAs, although aches and pains from May rarely wind up meaning that much. The exceptions are the serious injuries, of course, and injuries for players who have histories that make any physical setback reason for concern.

Cowboys running back DeMarco Murray would fall into the latter group. He’s missed nine games over his first two seasons, including six last season with a foot problem, and had his fair share of injuries in college as well. That backdrop made word that Murray missed the first day of Cowboys OTAs with what coach Jason Garrett described as a “hamstring tweak” jump out more than it might for another player.

Garrett said, via the team’s website, that the team was taking a conservative approach with Murray because there’s no sense in doing anything else in May. He’s right, although that won’t do much to quiet concerns about the Cowboys offense should Murray wind up missing any significant time. Philip Tanner, Lance Dunbar and rookie Joseph Randle represent a big drop from Murray and the team will need a more effective running game to snap their playoff drought in 2013.