Oakland wide receiver Amari Cooper is leaving no doubt about his readiness to compete against the best defensive backs in the NFL. 

The Raiders took the national stage for a game with the Arizona Cardinals on Sunday night, and Cooper made it look easy at times. This sharp route, catch, and run for a big gain against Patrick Peterson had social media talking.

Cooper finished the game with four catches for 62 yards to lead Oakland in receiving. He hasn't played too many minutes in the preseason, but he's shown flashes of that incredible talent that made him Alabama's career leader in nearly every receiving category.

And in case you're wondering whether Cooper's soft-spoken and humble demeanor has changed at the professional level, watch his post-game conversation with the media after the loss to Arizona.

The Raiders will open its season on September 13 with an afternoon matchup against the Cincinnati Bengals.