"Jahvid Best says beyond a shadow of a doubt, he'll in the Detroit's backfield next season.

Lions general manager Martin Mayhew is still waiting for the all-clear on the running back who saw his 2011 season cut short due to a concussion he suffered in Week 6 – his second within two months.

"No, we haven't gotten any (word)," Mayhew said. "He's still being evaluated by people, but we're very optimistic with the preliminary reports we have.""