35-year old DT Jason Ferguson was facing a 8-game suspension at the start of the 2010 season and he decided it just wasn’t worth playing anymore as he has retired from the NFL.  Ferguson played in 9 games for the Dolphins last season and he had 23 tackles and 1 pass defensed.  He played two years for the Dolphins appearing in 25 games in which he made 45 tackles and defensed 1 pass.  He finishes his career having played in 159 games in which he had 496 tackles, 9 passes defensed, 21.5 sacks and he forced 6 fumbles.  The Dolphins were ready to replace Ferguson for the first 8 games of the season anyway so they won’t likely miss him too much.