Houston Texans head coach Bill O'Brien has insisted that running back Arian Foster's hamstring injury is "nothing serious".
The 27-year-old missed his side's practice session on Friday after making his return on Thursday, but O'Brien is adamant that Foster will be back to full fitness soon.
"He's doing okay," O'Brien told reporters. "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 recorded 725 total yards and two touchdowns in the 2013 season in eight games for the Texans.
