Johnny Manziel: I’m a rookie, I need to earn my place

The Browns’ emphasis on Johnny Manziel entering training camp as a backup has not gone unnoticed by Manziel himself. Manziel said at the Browns’ rookie minicamp today that he realizes nothing is going to be handed to him, and he needs to prove he belongs before he’ll be Cleveland’s starting quarterback. “I’m a rookie,” Manziel…