ST. LOUIS (AP) — There's no telling how these wacky World Series games will end.
One night after a rare obstruction call, Jonny Gomes hit a decisive homer when he wasn't even in the original lineup and Koji Uehara picked off a rookie at first base for the final out.
An entertaining, even goofy World Series is tied at two games apiece following Boston's 4-2 victory Sunday night, which ensured the title will be decided back at Boston's Fenway Park.
"Emotional roller-coaster here, obviously," Gomes said.
Inserted into the lineup about 75 minutes before gametime, Gomes hit a tiebreaking, three-run shot off reliever Seth Maness in the sixth inning.
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 hang on.
And of course, another bizarre ending: Uehara picked off pinch-runner Kolten Wong — with postseason star Carlos Beltran standing at the plate.
It was the first postseason game in history to end on a pickoff, according to STATS.
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.
Gomes helped get Boston started in the fifth when he followed David Ortiz's leadoff double with a 10-pitch walk that tired starter Lance Lynn, who had faced the minimum 12 batters through the first four innings.
Stephen Drew's sacrifice fly tied the score 1-all, erasing a deficit created when center fielder Jacoby Ellsbury's third-inning error advanced Matt Carpenter into scoring position for Beltran's RBI single.
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.