All are believed to have signed one-year deals.
Cousins (pictured) has annually struggled in pass protection since the Ravens selected him in the third round of the 2008 draft. He made one start at right tackle for Cleveland last season and was benched during the game.
Smith has spent the past two seasons with the Browns, catching 15 passes. He is primarily a blocker.
Schaefering was an exclusive rights free agent. He will earn $540,000 if he makes the Browns’ 53-man roster.