Final answer:
George Blanda is the football player who had a 26-year career with the Bears, Oilers, and Raiders. He played as a quarterback and placekicker and was inducted into the Pro Football Hall of Fame.
Step-by-step explanation:
The player who had a 26-year-long illustrious pro football career playing for the Chicago Bears, Houston Oilers, and the Oakland Raiders was George Blanda. Blanda played as a quarterback and placekicker during his long tenure in professional football. His career spanned from 1949, when he started with the Chicago Bears, until he retired in 1976 as a member of the Oakland Raiders.
Blanda's longevity in the game and his ability to play multiple positions were highly unusual and contributed to his legend within the National Football League (NFL). He holds the distinction of being one of the few players to have played in four different decades. Notably, Blanda was inducted into the Pro Football Hall of Fame in 1981.