A native of New Bedford, Mass., Pires will assist defensive line coach Clarence Brooks, as well as handle quality control on the defensive side of the ball.
Pires spent the last two seasons as linebackers coach with the Detroit Lions, after coaching the Arizona Cardinals linebackers for five years in his first NFL coaching job.
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Former Dolphins first-round pick John Avery could be back in the NFL next season.
Avery, who rushed for over 1,400 yards for Edmonton of the Canadian Football League in 2002, has signed with the Minnesota Vikings.