Rookie Toby Gerhart received far more work with the first-team offense on Saturday than Albert Young, but the No. 2 halfback job behind Adrian Peterson apparently is headed for a timeshare.
"I think it'll be by week and who we're facing and what exactly we need out of a second running back," Childress said. "If you remember last year, there were numbers of games where we didn't have a third running back up, and from time to time, that'll happen when we need maybe another tight end up or need another rush guy. ... Those guys are (numbers) 2 and 2A."
Gerhart injured his right knee on Saturday and was missing when practice resumed on Monday morning, but his status isn't believed to be in doubt for the opener.