The third incarnation of the Baltimore Colts – the second as an official member of the NFL – produced some of the most memorable and dominant teams to ever play the pro game.

Winners of impressive back-to-back NFL titles over the New York Giants in both 1958 (the December 28th Yankee Stadium sudden-death overtime final regarded as the mythic "Greatest Game Ever Played") and 1959, the Colts and head coach Weeb Ewbank surprisingly stumbled into mid-table mediocrity in the early years of the 1960s – enough to convince mercurial owner Carroll Rosenblum to make a stunning change at the end of the team's (7-7) 1962 season – one that would quickly shake up the squad and the expectations behind it.

The selection of Detroit Lions defensive coordinator Don Shula to become the new head coach of the Colts was eyebrow-raising for a number of reasons – age (at 33, the youngest-ever to be chosen for such a role in the NFL up until that time); relative inexperience (only two years as a college assistant at Virginia and Kentucky before his first pro stint in Detroit building the famous "Fearsome Foursome" defense); and karma – cut by the Colts as a player seven years earlier, Shula was now suddenly coach over former teammates who hadn't previously accorded him much respect.

Chief among those players was quarterbacking legend-in-the-making Johnny Unitas – arguably the Colts' most valuable franchise player, who was hugely responsible for the team's titles in the late 50s, and through whom any future success depended.

Author Jack Gilden (Collision of Wills: Johnny Unitas, Don Shula and the Rise of the Modern NFL) joins host Tim Hanlon to discuss how these two eventual Pro Football Hall of Fame titans battled each other and the rest of the NFL during the remainder of the 1960s, and lifted the Colts back to elite status in the league – while setting themselves both up for further individual greatness once they again parted ways.

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