Kyler Murray is already posting huge numbers in the NFL and setting records at that.

The first-overall draft pick signed his first autograph as a Cardinal just moments after being drafted, on a helmet that was then auctioned for $3,450. That's the most a draft helmet has gone for to date in the league's auction.

He signed his name, along with the message "Go Cards!" shortly after hearing his name called.

The proceeds are going back to the football program at Allen High School, where Murray graduated from in 2014 after dazzling even as a high school quarterback.