Raiders' Carr still growing as a quarterback

The quarterback is supposed to be calm, cool and collected. And Derek Carr is all of those things, as evidenced by the Raiders’ seven fourth-quarter comebacks last season.

It’s a process for Carr every week, because he is nearly out of control in the first quarter. He has the mentality of a safety looking for a running back to crack, and coaches are always telling him to breathe when the games start.

Carr had an excuse a couple of weeks ago, in the preseason game against the Rams, his first live action since breaking his leg in Week 16 last season.

“I was overly excited,” Carr said. “I’m not going to lie to you: When I took that first snap on the pass to Jared (Cook) on the shallow, as I was…