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With his size and speed, Carey has impressed his coaches, though it’s unclear what his role will be. After an all-state career at Canyon del Oro High School in Arizona, Carey is still learning pass protection and picking up blitzes.

“He has the physical maturity that you like in a back,” Stoops said. “Now, it’s the mental maturity to understand the details that are important to be really successful.”

Carey rushed for 69 yards in Arizona’s scrimmage and is expected to help out with kickoff returns.

“(It’s) just the speed, adjusting to the speed, playing at this level is a different level,” said Carey, who’s behind Antolin and Jenkins on the depth chart. “You’ve just got to adjust.”

But it won’t just be running the ball. Running backs coach Garret Chachere said his players will have to be good at picking up blitzes and pass protecting to give Foles a chance to make plays.

“When we get our chances, if we get 25 chances to run the ball, make the most of them,” Chachere said. “Twenty to 25 carries by the running backs is enough to make an impact on the game.”