Mitchell played 37 games with 21 starts in three seasons (2014-16) for the Dolphins after he was signed as an unrestricted free agent on March 12, 2014.
Whether a trade materializes, Albert isn't going to be a Dolphin in 2017.
The Dolphins aren't keeping left tackle Branden Albert, but they found out quickly that there was sufficient interest in him elsewhere that they might get something for him.
Albert, 32, has a $10.6 million for the 2017 season. Williams originally entered the National Football League as the No. 1 overall pick in the 2006 National Football League draft by the Houston Texans. He hasn't played a full season since 2011, which is also the only full season of his career.
While Miami is making way for a young emerging star like Laremy Tunsil, the reality is that Albert has plenty left in the tank as a solid starter and should earn a decent amount of suitors fairly quickly. The moves are being regarded simply as salary cap moves, as the team tries to free up some space ahead of the upcoming NFL Draft.
Williams, 32, signed with the Dolphins last offseason after he was released by the Buffalo Bills. This and Albert's lofty contract are paving a path out of south Florida for the seasoned edge blocker.
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Albert's name was not on the NFL's official transactions wire Thursday, though both he and his agent were informed Thursday morning that the Dolphins planned to release him, sources told ESPN.
Miami saves a further $4m (£3.2m) by releasing 29-year-old defensive tackle Mitchell, who was entering the final year of a four-year contract.
It's a position he is ready to take. He's missed 13 games since joining the club in 2014.
The Dolphins went 10-6 last season and made the playoffs for the first time since 2008. The Dolphins have themselves some leverage now as they were ready to cut him.
So when defensive end Mario Williams was drafted out of North Carolina State, the big man had a big target on his back for those who wanted to quickly label him a bust.