Midseason free agents can make massive impacts on the biggest stage.
In 1996, the Green Bay Packers picked up free-agent wide receiver Andre Rison, who had just been released by the Jacksonville Jaguars. Rison had a relatively quiet regular season and NFC postseason for the Pack, but he gave Green Bay a huge momentum boost in Super Bowl XXXI against the New England Patriots after he hauled in a 54-yard touchdown pass from quarterback Brett Favre to open the scoring.
Green Bay eventually took home the Lombardi Trophy 35-21.
Fifteen years later, ex-New York Giants linebacker Chase Blackburn was about to take an eighth-grade teaching job in late November when his old team called him and offered him a roster spot.