Will Larry Johnson be the new RB?

With Clinton Portis likely missing Sunday's game against the Denver Broncos, the Redskins could have a new running back on the roster in the next few days. What's not as clear: whether Larry Johnson will be that new running back. Johnson was released this morning by the Kansas City Chiefs. If he clears waivers, he'd become an unrestricted free agent and any team would be free to negotiate for his services. There are several reasons the deal could go down. First, Portis' status is unknown. Coach Jim Zorn was essentially guessing that Portis would be unavailable this weekend. He said the running back did suffer a concussion in Sunday's loss at Atlanta. The two spoke this morning and Portis told Zorn he still had a headache. The league is taking concussions more seriously than ever, evidenced most recently by the fact that the Eagles' Brian Westbrook missed his second straight