What professonal teams forced a game 7 after being down 3-0?

As of October 2023, the only professional sports teams that have managed to force a Game 7 after being down 3-0 in a playoff series are the 2004 Boston Red Sox in Major League Baseball and the 2010 Philadelphia Flyers in the NHL. The Red Sox famously completed this comeback in the ALCS against the New York Yankees and went on to win the World Series. The Flyers achieved their comeback in the Eastern Conference semifinals against the Boston Bruins, although they ultimately lost in Game 7.