Amari Cooper disappointed last year after topping 1,000 receiving yards in each of his first two NFL seasons.

The Oakland Raiders need Cooper to be the player he was in his first two seasons, says Jon Gruden.

"He has to get healthy and stay healthy," Gruden said. "We need him to be the player he was the first two years. I've said it earlier. We're going to make him the main vein of our passing offense and move him around a lot. ... We are really excited about him. I think he's entering the prime of his career."

Gruden sees similarities between Cooper and Tim Brown, who he coached for five seasons.

"I said it when he came out of Alabama, that he reminded me of a young Tim Brown," Gruden said. "He has that type of game speed. He's elusive, and has a wide range of routes he can run. He's flexible. It'll benefit him to stay healthy and stay in the same system for a few years. If he does that, great things are ahead."