Williams played college football for the University of Texas, where he was a two-time All-American and won the Heisman Trophy. He was drafted by the New Orleans Saints fifth overall in the 1999 NFL Draft and spent three seasons with the team before he was traded to the Miami Dolphins in 2002. He played for the Dolphins for three seasons, and retired for the first time from football in 2004. Due to his suspension from the NFL in 2006, he played for the Toronto Argonauts in 2006. He re-joined the Dolphins in 2007 and played with them until 2010, and spent the 2011 season with the Baltimore Ravens.

This Texas Longhorns mini helmet was signed in black by Williams and inscribed, "98 Heisman." This mini helmet includes a Great Moments COA.