Like a Broadway understudy, Johnny Manziel knows he might practice with Cleveland's starters all week and not play Sunday. With starting quarterback Josh McCown still recovering from a concussion, Manziel is preparing as if he'll start Sunday's home opener against the Tennessee Titans in what could be a matchup against fellow Heisman Trophy winner Marcus Mariota. Manziel, who replaced McCown after he was knocked out of the season opener against the New York Jets, took snaps with the Browns' starting offense Wednesday as the team began installing its game plan for the Titans. More...