The lack of sleep and the early-morning flight from Dallas to Las Vegas followed by his first Raiders practice was taking its toll on Amari Cooper by the time late Tuesday afternoon rolled around.

But Cooper was also excited about the opportunity to prove he still is one of the NFL's top wide receivers as he rejoined the organization that drafted him fourth in 2015 out of Alabama.

At the time, the Raiders were based in Oakland, and only left tackle Kolton Miller remains from the roster of the teams for which Cooper played 3 1/2 seasons.

“I always had (a return) in the back of my mind because I was drafted here,” Cooper said. “I felt like the expectations were high, and I felt like I did OK. But I always knew you draft a guy in the top five, you really expect them to come and change the

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