ST. LOUIS — Jonny Gomes got the Red Sox even in this wild World Series, thanks partly to Shane Victorino’s aching back.

Inserted into the lineup about 75 minutes before gametime, Gomes hit a three-run homer off reliever Seth Maness in the sixth inning that led Boston to a 4-2 win over the St. Louis Cardinals on Sunday night, tying the Series at two games apiece.

Felix Doubront and surprise reliever John Lackey, both starters during the regular season, picked up for a gritty Clay Buchholz to help the Red Sox ensure the Series will return to Boston.

And one night after that game-ending obstruction call, another unusual ending. Koji Uehara picked off rookie pinch-runner Kolten Wong at first base for the final out — with postseason star Carlos Beltran standing at the plate.

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Game 5 is Monday night at Busch Stadium, with Boston left-hander Jon Lester facing Cardinals ace Adam Wainwright in a rematch of the opener won 8-1 by the Red Sox.

David Ortiz, who homered in the first two games of the Series, had three of Boston’s six hits and was the club’s leader, smacking his hands together and screaming at teammates to get going when he pulled into second base on his double. Then, after the fifth inning, he huddled the Red Sox for a pep talk in the dugout. Not long after, Gomes’ drive put Boston ahead 4-1.