In the news release announcing all of these moves, general manager Tom Heckert said, "With the additions of Juqua and Frostee, we have added to the defensive mentality that we are looking for.”
The Browns once thought the same thing about Mitchell, who turned out to be among the team's biggest disappointments on defense the past two seasons. He failed to become an impact player, and was eventually benched last season.
Cleveland traded a late-round draft pick to the Minnesota Vikings for Mitchell on Oct. 5, 2010. He didn't fit the Browns' 3-4 defense and didn't play in any games.
When the Browns switched to a 4-3 defense, the Browns re-signed Mitchell because they envisioned him as a pass-rushing end. Mitchell was switched from left to right defensive end early in the season because rookie Jabaal Sheard preferred the left side. Mitchell was removed from the lineup after seven starts and 1.5 sacks at right end.
Mitchell, 28, was scheduled to make a base salary of $2.4 million in 2012, the final year of his contract.