However, Isaac decided to attend the University of Kansas on a full-ride scholarship to further his career in both football and baseball and to continue his education.
After a stint in the minor leagues and batting over .300, Isaac returned to college to continue his education and his football career.
His high point came when he started in Super Bowl XXXIV for the Tennessee Titans against his hometown team, the St. Louis Rams.
[clarification needed] Isaac's older brother, Israel Byrd, played college football at Utah State and professionally for the New Orleans Saints.
After retiring from the NFL, Isaac has been focusing his time and expertise in developing both the physical and mental strengths of amateur athletes.