Short answers, pulled from the story.
The largest comeback in NFL history occurred on the 3rd of January 1993 when the Buffalo Bills recovered from a 32-point deficit to win 41, 38 against the Houston Oilers in overtime. This game is known as The Comeback and was later surpassed by the 2022-23 Minnesota Vikings who came back from a 33-point deficit to score 32 unanswered points against the Indianapolis Colts.
The New England Patriots made the largest comeback in Super Bowl history on the 5th of February 2017 when they defeated the Atlanta Falcons 34, 28 in overtime after being down by 25 points in the third quarter. This 25-point comeback remains the largest in Super Bowl history and secured the Patriots their second championship title in three years.
The Boston Red Sox achieved the greatest comeback in MLB history during the 2004 American League Championship Series when they became the first and only team to come back from a 3, 0 series deficit to win against the New York Yankees. This victory ended the Red Sox's 86-year championship drought known as The Curse of the Bambino.
The largest comeback in NBA history occurred on the 27th of November 1996 when the Utah Jazz overcame a 36-point deficit to defeat the Denver Nuggets 107, 103. The Jazz were led by Karl Malone with 31 points and Jeff Hornacek with 29 points during this historic game.
The Los Angeles Kings made the largest single-game comeback in NHL playoff history on the 10th of April 1982 when they trailed the Edmonton Oilers 5, 0 going into the third period. The Kings rallied to score 5 unanswered goals and won 6, 5 in overtime on a goal by Daryl Evans, an event dubbed the Miracle on Manchester.