The 2004 Red Sox succeeded. Thirty-three other teams have tried to come back from three games down and failed.
Theo Epstein was the Red Sox's general manager in 2004, and he is the Cubs' president now. "Rumor has it, it's been done before," Epstein told postgame reporters on Tuesday about coming back from a 3-0 disadvantage.
He would know. With the Red Sox back then, Epstein had a manager in his first year with the team in Terry Francona. And now he has one in his first year with the Cubs in Joe Maddon. That is among the similarities between those Red Sox and these Cubs, and the Internet has been abuzz with several others. Among those that we like:
Each had a curse it was trying to overcome
The Red Sox were dealing with the "Curse of the Bambino.” They hadn't won the World Series since 1918.
The Cubs are dealing with the "Curse of the Billy Goat.” They haven't won the World Series since 1908.
Each was a wild-card team
The 2004 Red Sox were 98-64 and finished second in the AL East.
The 2015 Cubs were 97-65 and finished third in the NL Central.
Each had to defeat a New York team when down 3-0
The Red Sox faced the Yankees in the ALCS. They won Games 4 and 5 at home, then Games 6 and 7 on the road.
The Cubs are down 3-0 to the Mets in the NLCS. They have to win Games 4 and 5 at home, then Games 6 and 7 on the road.
Additionally, the Red Sox had to get past their archrival in the Yankees to advance to the World Series. The Cubs defeated their archrival (the Cardinals) to advance to the NLCS.
Each team had to deal with a dominant closer
Yankees closer and all-time saves leader Mariano Rivera blew save chances in Games 4 and Game 5 of the ALCS.
Jeurys Familia enters Game 4 of the NLCS having allowed four runs in his last 38 innings pitched.
The Red Sox got a valuable contribution from a pinch runner. The Cubs have a player who could fill that role.
Dave Roberts had a key stolen base for the Red Sox in the ninth inning of Game 4, then scored the tying run.
Quintin Berry was 27-of-28 on steal attempts during the regular season; he is 5-of-5 in the postseason. He's on the Cubs' NLCS roster.
Manny being Manny
In 2004, Manny Ramirez was the Red Sox's left fielder.
In 2015, Manny Ramirez is the Cubs' hitting consultant.