New England Patriots defensive lineman Armond Armstead, a highly touted prospect who signed with the team in 2013 after an all-star season in the Canadian Football League, has announced his retirement. Armstead, 23, was referred to as a top-3 player in the Patriots' defensive tackle rotation last year by coach Bill Belichick, but an infection before the start of 2013 training camp ultimately landed him on season-ending injured reserve. He never played a game with the team. Armstead suffered a heart attack while at USC, where he played from 2008 to '10, and he later sued the school. His medical condition had led him to the CFL, where he starred for the Toronto Argonauts in 2012 before signing with the Patriots on Feb. 1, 2013. Read more http://espn.go.com/boston/nfl/story/_/id/11224120/armond-armstead-new-england-patriots-retires
