for 300 yards and four interceptions. He did get background on what Arians likes to run in his offense, what his tendencies are as a play-caller, how Palmer and backup Drew Stanton prepare. Those details inevitably will be a help, and provide an advantage over Coker.

To run the offense himself this summer, however, "there was giddiness, no doubt," Barkley said.

"He came from coach (Chip) Kelly's system in Philly and there isn't a whole lot you need to know, other than look at the card and throw the ball," Goodwin said. "We're a little bit more complicated in our offense."

Barkley – and Coker, for that matter – benefits from the Cardinals' use of two fields during 11-on-11 and 7-on-7 work during OTAs. Assistant head coach Tom Moore is the guru overseeing the two young QBs as they learn the system. There are plenty of reps to be had.

Last season, the Cardinals couldn't make many judgments on Barkley given what he couldn't really do, but now, "I definitely think whatever happens over there can make or break you," Barkley said.