He's enshrined as a member of the College Football Hall of Fame for his record-breaking, two-time consensus All-American fullback rushing career at Syracuse in the mid-1960s.

He's an inductee of the Pro Football Hall of Fame, most notably for his dominant rushing prowess with the Don Shula-coached Miami Dolphins of the early 1970s - and his leading role in the club's three consecutive Super Bowl appearances, two back-to-back NFL titles, and its unparalleled perfect undefeated season in 1972.

But in our conversation this week with legendary gridiron star Larry Csonka ("Head On: A Memoir"), we digress (and obsess) into some of the lesser-known chapters of an impressively unique career - including his first professional years with Miami as part of the old American Football League in the late 60s; a bombshell move (along with Dolphin teammates Paul Warfield and Jim Kiick) to the upstart World Football League's Memphis Southmen (née Toronto Northmen) in 1974; and front office roles with the original USFL's Jacksonville Bulls (1984-85).

Head On: A Memoir - buy book here