Short answers, pulled from the story.
The Playoff Bowl emerged in the early 1960s as a financial engine for the National Football League to generate revenue for player pensions. It served as a consolation match for teams that finished second in their respective conferences from the 1959 season through the 1968 season.
All ten iterations of the Playoff Bowl took place at Miami's Orange Bowl stadium during its run from 1959 to 1968. The event occurred every January, typically scheduled the week following the NFL Championship Game with one exception in the final year.
The Detroit Lions hold the record for most victories with three wins and a perfect 1.000 winning percentage. The Baltimore Colts also won two games without losing once while the Los Angeles Rams secured two victories without defeat.
The final season occurred in January 1970 before the leagues fully merged when discussions about continuing a losers' game failed to gain traction. Interest declined sharply after the Super Bowl emerged and the AFL-NFL merger fundamentally altered the structure of professional football playoffs.
The 7th of January 1961 game marked the debut of the slingshot or tuning fork goalpost design which featured one curved support structure instead of two uprights. The NFL adopted this single-support post for the 1967 season and it remains standard today.