Texans' Foster battling hamstring woes early in camp

Houston Texans running back Arian Foster returned to the practice field Thursday after missing two days to nurse a sore hamstring, but his participation didn't last long. 

Foster was back on the sidelines as practice began Friday with what the Houston Chronicle presumes is a re-strained hamstring. 

“He’s doing OK,” head coach coach Bill O’Brien said. “It’s kind of a day-to-day thing. It’s nothing serious. I would assume – (but) guess you can’t assume anything – he’d be back pretty soon.”

Foster has a history of hamstring woes. Things were especially bad in 2011, when he tore a hamstring.

The good news here, if there is any, is that Foster doesn't seem to be experiencing any significant issues in his surgically repaired back.