Texans RB Arian Foster sat out with sore back. "Expected him out there today but it didn't happen," said HC Gary Kubiak.
It's actually a good sign that the calf wasn't the reason Foster couldn't return. He got a ton of work in 2012 and knows the offense. The more preseason rest he gets, the better, though it's understandable why some owners are worried that he's not practicing.