ALAMEDA, Calif. -- Amari Cooper's initial impression of Calvin Johnson?
"He's huge," Cooper said. "I can understand why they call him Megatron. He definitely lives up to that."
Literally, and figuratively.
The 6-foot-5, 239-pound Johnson is a guest of the Oakland Raiders in OTA's this week, working with the receivers in an advisory role. And the 6-1, 211-pound Cooper has been bending his ear.
"He just gave me some really good tips on how I can run some of my routes," Cooper said. "He's a different receiver than I am, obviously, but I really admire the way he high-points the ball.