As of this post, the Cleveland Browns' roster is at the maximum limit mandated by the NFL: 90 players. They were at 88 players before rookie minicamp, but recently signed veteran OT Rashad Butler and tryout RB Robbie Rouse to contracts, bringing that total up to 90.
Here is the situation now: there were 19 other players who tried out this weekend, and all indications are that they are about to sign at least one of them in NT Nick Jean-Baptiste. That would put Cleveland at 91 players, which might be one of the reasons he wasn't officially signed on Sunday.
Although the team does have five "unsigned draft picks," including Barkevious Mingo, Leon McFadden, Garrett Gilkey, Jamoris Slaughter, and Armonty Bryant, they all count toward the team's 90-player limit.
With all of that in mind, if the Browns want to add some other young bodies, or even a couple of veteran players (like a safety), then some releases could be in the near future. Scan the team's roster page to see how things stand right now.