49ers' guard Larry Allen is expected to announce his retirement after 14 seasons, according to a report on the NFL Network on Thursday. One of the strongest lineman to ever play the game, the 6-3, 325-pound Allen has appeared in 11 Pro Bowls in his illustrious career. A virtual lock for the Hall of Fame, Allen played most of his career with the Cowboys after being selected out of Sonoma State in the second round of the 1994 draft.