A number of factors play into this situation. First, McClain's return means that a roster space must be cleared for him. But with head coach Dennis Allen away from the team until Wednesday, as he attends his father's funeral, the roster conflict may not be cleared up right away.
Second, McClain may not be willing to return. He was dismissed from the team for two games after being sent home from practice in late November. McClain then posted five statements against the team on his Facebook page, according to Paul Gutierrez of Comcast Sports Net Bay Area.
"Officially no longer an Oakland Raider!!"
"Well technically I am. But I'm mentally done. Just waiting on my papers."
"It's out of my hands right now."
"I'm gonna weigh my options. Looking forward to playing for an actual 'team."
"I'd like to be anywhere besides here."
Gutierrez also reports that McClain has been unapologetic, and general manager Reggie McKenzie is leaving the next step in this process to McClain.
McClain has 60 tackles, one sack and one forced fumble in 11 games for the Oakland Raiders this season.