Is it time to worry about Trent Richardson?

The Cleveland Browns received some bad news last week, and for once, it didn't involve gas rebates or an FBI probe.

Running back Trent Richardson sat out last week's workouts with a pulled muscle in his shin and could be sidelined for next month's mandatory minicamp. That would mean the next time Cleveland would see Richardson on the field is training camp in late July.

Is it time to worry about Richardson's durability? Not at this point. Of course, the Browns would want Richardson to be running at full speed right now. And, when you consider his knee and rib injuries from a year ago, it seems like Richardson has been banged-up since he put on a Browns uniform.

What you have to keep in mind is the Browns are doing this as a precaution. This is the time of year to be extra cautious so injuries remain minor. It's hard to question Richardson's durability after last season, when he played 702 snaps, the ninth most among NFL running backs.

Richardson, though, needs to be healthy if he wants to break out this season. He has the potential to be a top-five back in this league, especially under Norv Turner's play calling. Richardson can do it all because he has speed and power. He can play all three downs and punch the ball across the goal line when in the red zone. But, if Richardson continues to deal with injuries, critics will once again question whether it was smart to use the No. 3 overall pick on a running back.