Bruce Arians is "optimistic" that his QB Carson Palmer will be playing on Thursday

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Arizona Cardinals head coach Bruce Arians on Monday has admitted that the chances of his starting quarterback Carson Palmer will be a day to day issue since Palmer is recovering from a concussion injury he suffered during the Cardinals 17-13 loss to the Los Angeles Rams on Sunday. Carson is currently on the National Football League concussion protocol at this time which will make it hard for Palmer to be given clearance to resume his starting quarterback duties on Thursday when the San Francisco 49ers will be hosting the Cardinals. Arians admits that Wednesday will be the due date when he will have to choose between Palmer as his starting quarterback or Drew Stanton to be his starting quarterback of the Cardinals on Thursday, Palmer told Arians he felt better on Monday from his concussion injury but the league will have to give the green light to play football on Thursday,