In addition the Patriots announced that rookie DL Marcus Forston has been released.
McClain, 24, is in his second NFL season. The 6-foot-2, 291-pounder joined the NFL as a third round draft pick (65th overall) of the Carolina Panthers out of South Florida in 2011. Last season with the Panthers, McClain started in 12 games and finished the season with 19 total tackles, one sack and one fumble recovery. He was released by Carolina on Sept. 2, 2012.
Forston, 22, was signed by the Patriots as a rookie free agent on May 10, 2012 out of Miami. The 6-foot-3, 305-pounder, was inactive for the first two games of the 2012 season before making his NFL debut last Sunday night at Baltimore with action on defense as well as on special teams.