Ken Gray is considered one of the best offensive linemen in the early days of the NFL in the 1960s. Gray began his career at Llano High School and was a 4-year letterman (1954-57) at Howard Payne University, where he was an All-Lone Star Conference player and named to the Little All-America team. Gray was drafted in the 6th round (62nd overall pick) by the Green Bay Packers in 1958 before earning a roster spot with the Chicago Cardinals (later the St. Louis Cardinals). He was named to seven NFL Pro Bowls as an offensive guard for the St. Louis Cardinals and was a consensus All-Pro in 1963-65 and 1967. Gray was recognized as the first-team guard on the NFL's All-1960s Team and the Cardinals' All-Time Team. He spent 12 years with the Cardinals before joining the Houston Oilers in 1970. After retiring from the NFL, Gray returned to Llano High School as the head coach (1973-75). 1973 was one of the most successful seasons in Llano history as Gray led them to the state quarterfinals. His son, Boyd Gray, was the star running back and linebacker for the team. Gray went on to be the offensive line coach for the Denver Broncos during the 1977-1978 seasons. Since the end of his playing and coaching days, Gray was inducted into the NAIA Hall of Fame and the Howard Payne Hall of Fame.