Cards WR J.J. Nelson showing off his speed

Carson Palmer wanted it back, that deep ball he heaved down the sideline to wideout J.J. Nelson in the first quarter Saturday.

His rookie speedster had gained a step on cornerback Richard Crawford, but the veteran quarterback has thrown countless bombs in his career, and knows an overthrow when he lets one fly.

Except, this time, he was wrong. As the ball ended its descent, Nelson sat there waiting for it, actually slowing down in order to complete the 57-yard gain.

“I can’t wait to watch it on film,” Palmer said. “He must have hit the nitrous button because he took off.”

When the Cardinals selected Nelson in the fifth-round of the draft, they knew he had speed. The Alabama-Birmingham star had the fastest 40-yard dash at the NFL Scouting combine and figured to come in and compete for kick and punt return duties immediately, the story said. His playing time at wideout was less certain, with Michael Floyd, Larry Fitzgerald and John Brown taking up the majority of the snaps and Jaron Brown and Brittan Golden battling Nelson for the fourth receiver spot. But with Floyd recovering from three dislocated fingers in his hand, it was Nelson who started alongside John Brown and Fitzgerald in a three-receiver set in the 22-19 preseason loss to the Chargers. Much like John Brown last year, Nelson could be a guy who comes out of no where on the Cards deep list of WRs.