Retired NFL Great Joe Thomas Shows Incredible Weight-Loss Transformation

Tackle Joe Thomas #73 of the Cleveland Browns blocks during a game against the Denver Broncos at Sports Authority Field at Mile High in Denver, Colorado on Dec. 23, 2012 Dustin Bradford/Getty Images

A former All-Pro offensive lineman now looks quite different from his football playing days.

Joe Thomas, a future Hall of Famer who played for the Cleveland Browns, once weighed more than 300 pounds.