Quarterback Brock Purdy is "highly unlikely" to start on Sunday for the San Francisco 49ers as he deals with a toe injury that has already sidelined him for one game.

Purdy was officially listed as questionable for the game against the Arizona Cardinals with a final decision on his status likely to come on Saturday. Coach Kyle Shanahan said Purdy could be available as the backup or the emergency third quarterback if he can't start.

"A lot of progress and thought he had a good week," Shanahan said. "We'll see how he does tomorrow. It's highly unlikely that he will start."

Mac Jones would start his second game for San Francisco if Purdy isn't ready. Jones threw for 279 yards and three TDs in his first start last week against New Orleans .

If Purdy is inactive or designated as the

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