1961 Fleer football card of former running back John Olszewski, who started his career with the NFL’s Chicago Cardinals in 1953. He had a decent career, making the Pro Bowl twice. He was nicknamed “Johnny O”, and wore the jersey number 0, as seen in the card, which was a rare allowance for individualism by the buttoned-down NFL at the time. His NFL career wound down with the Detroit Lions in ’61, but he resurfaced the next year in the AFL with the Denver Broncos, playing just the 1962 season there before retiring.