LOS ANGELES (AP) -- Several things have changed for the first-place Colorado Rockies since they finished last season with a 64-98 record.
Jorge De La Rosa's lack of success against the Los Angeles Dodgers isn't one of them.
The left-hander went into Tuesday night's game 0-7 with a 6.22 ERA against the Dodgers. He left with an 0-8 mark after a 6-2 loss.
"It's like they know what's coming," said De La Rosa, who had logged quality starts in his four previous outings. "I have to do something different the next time I face them."
De La Rosa (2-3) allowed six runs and 11 hits in four innings.
His counterpart, Hyun-Jin Ryu, had everything going for him in his first career start against the Rockies.
Ryu (3-1) struck out a career-high 12 batters, the most by a Dodgers rookie since Hideo Nomo fanned 13 on Aug. 20, 1995, against the New York Mets.
"He just kind of keeps stepping up," Los Angeles manager Don Mattingly said. "It's pretty cool to watch because of the way he yo-yos guys. I like watching him pitch."
The Dodgers also got to enjoy the return of Hanley Ramirez, who had been sidelined since surgery on his thumb before the season. Ramirez highlighted his return to the starting lineup with a solo home run in the third inning.
Los Angeles erased a 1-0 deficit in the first inning with a run-scoring single by Matt Kemp and a sacrifice fly by Adrian Gonzalez.
They increased their lead in the second inning when Jerry Hairston Jr., a late replacement for Carl Crawford, singled home Juan Uribe from second base. Hairston went to second base when left fielder Michael Cuddyer tried to throw out Uribe at home.
Crawford was scratched from the starting lineup with tightness in his right hamstring but will likely be back on Wednesday.
Nick Punto added a single in the second inning to score Hairston and give the Dodgers a 4-1 lead. Ramirez's home run in the third gave the Dodgers a four-run cushion. Later in the inning, Andre Ethier scored on a hit by Ryu.
"I'm very happy," Ryu said through a translator. "I'm just very thankful the game turned out the way it did."
The Rockies had to have some sense of what awaited them. Kemp entered the game with a .435 batting average against De La Rosa. Punto raised his average against De La Rosa to .538 with his hit in the second inning.
"The Dodgers strung together some pretty good at-bats early on," Rockies manager Walt Weiss said. "I thought they did a nice job early on of putting together some good at-bats against him."
Ryu, on the other hand, was in control throughout most of his outing. After giving up a first-inning home run to Carlos Gonzalez, he retired 14 of his next 15 batters.
"He pitched well," said Jordan Pacheco, who struck out three times against Ryu. "It does make it difficult when you haven't faced a guy. You don't really know his tendencies or what he likes to go to. But at the same time he hasn't faced you, so it goes both ways."
NOTES: Rockies C Wilin Rosario did not play after taking a foul ball off his right foot the previous night. ... South Korean music star PSY was at Dodger Stadium to meet with his countryman, Ryu, who gave his game-worn jersey to the pop star after the game. ... The Dodgers recalled RHP Javy Guerra from Triple-A Albuquerque and optioned pitcher Josh Wall to the same team.
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