The Dodgers still trail the Cards 2-1 in the NLCS series, and have games four and five at Dodger Stadium.
"The playoffs are one-day momentum swings," Dodgers manager Don Mattingly said. "Right now I feel like we've kind of grabbed it."
The Dodgers jumped out to an early 1-0 lead in the fourth inning thanks to an RBI double to right that scored Mark Ellis.
Later on in the inning, Yasiel Puig connected on a pitch he thought would leave the Ravine, watched it sail into right as he raised his hands in excitement. Puig later saw it bounce off the wall and began to run the bases and ended up at third while clapping his hands igniting the sellout crowd. Carlos Beltran misplayed the ball that bounced off the wall and afforded Puig the triple.
Beltran spoke about the celebration of Puig during that play, "I'm in the outfield," he said. "I mean, it's not great. To me, I don't like it. But what can I say? I don't play for them. I just play over here. I just need to do my job. It is what it is. As a player, I just think he doesn't know about how to act."
Hanley Ramirez obviously felt differently about his fellow teammate, "he brings unbelievable energy every day. When we spoke to him, he told me, 'I got it today,' and he did. He's a great player."
With Puig stepping out of his slump, the Dodgers got another boost with Andre Ethier and Hanley Ramirez returned to the line up, which provided them an added boost of momentum and offense.
Ramirez connected on a hit off Wainwright, Carl Crawford burned the bases as he barely beat a tag from Cards catcher Yadier Molina that extended the Dodgers lead in the eight inning 3-0.
What can I say? It couldn't be better," Ramirez said. "Really happy we got the first win. Just come back tomorrow and even up the series."
Kanley Jansen pitched a perfect inning and picked up the save for the victory.
Adam Wainwright began the game 4-0, picked up the loss. He pitched seven innings and gave up two runs, six hits and seven strike outs on the night.
"I felt like tonight if I had got a couple of balls in there, we win the game. I think you just have to tip your hat and move on," said Wainwright. "I hate to lose like this!"
Ryu was successful in not giving up any runs in the first inning, and picked up his first postseason win as a rookie.
He looked healthier as he sat down 12 out 13 batters on the night. He went seven great innings, gave up three hits along with capturing four strikeouts.
"It's definitely a big motivation when you see your star players go out there hurt," Ryu said through a translator. "It really inspires you and motivates you to go out there and do the best you can."
The Cards didn't get their first hit until the fifth inning when David Freese got a base hit to right.
"We just had a lot of balls in the air tonight that hit the ground that normally don't," Cardinals manager Mike Matheny said. "We're a better club than this."
The Dodgers are scheduled to send starter Ricky Nolasco to pitch Game 4 against Lance Lynn on Tuesday night.