Presumably, McCown will fill the role held last season by Brian Hoyer -- de facto starter until a time when Johnny Manziel (or another TBD young quarterback) is ready to take over the job. McCown could be a valuable resource for Manziel, if nothing else.
Beyond that, though, the book is more or less out on McCown. He parlayed a strong 2013 season in Chicago into a contract with Tampa Bay last year. Lovie Smith handed him the starting job early, but injury and inconsistent play marred McCown's year. He finished 1-10 as a starter with a 56.3 percent completion rate, 11 touchdowns and 14 picks.
Hoyer was a fan favorite in Cleveland, at least for a spell as he sparked the Browns to playoff contention. It all fell apart down the stretch, though, as the Browns finished 7-9.
Worse yet, Manziel entered rehab of his own accord this off-season, adding further mystery to his future.
So, McCown, again, finds himself as a safety net, albeit one with minimal upside. If Cleveland has any hopes of competing for a postseason spot soon, it will have to upgrade, be it via Manziel or otherwise.