Cardinals quarterback Carson Palmer still likely needs surgery to repair a broken left arm, but he will seek a second opinion on his own and there’s a chance he could return to the lineup sooner than expected, coach Bruce Arians said on Monday. Initially, Palmer was expected to be out for at least eight weeks, which likely would end his season. However, Arians met with Palmer early Monday morning upon the team’s arrival in Phoenix and Palmer apparently has talked with doctors who believe the quarterback could be ready to play in as little as four to six weeks. “Yeah, he was saying four to six weeks,” Arians said, laughing. “That’d be great.” Asked if that is overly optimistic thinking, Arians said: “It depends what the surgeon says. He is a fast healer.” Palmer injured his non-throwing arm during the first half of Arizona’s 33-0 loss to the Rams in London and was replaced by backup Drew Stanton, who will start in Palmer’s place.