LOS ANGELES (AP) — Clayton Kershaw impressed just about everybody except himself in becoming the Los Angeles Dodgers’ first 20-game winner in 21 years. Fittingly, his accomplishment came against a team he has dominated this season.

Kershaw improved to 5-0 against San Francisco with a 2-1 victory on Tuesday night that pushed the Giants closer to elimination from the NL West race.

Kershaw (20-5) allowed six hits and one run in 7 1-3 innings, walked two and struck out six to become the first Dodgers pitcher to go 5-0 against the Giants since Vic Lombardi in 1946. He did it on what would have been Lombardi’s 89th birthday.

“Don’t overthink it,” Kershaw said of his strategy against the Dodgers’ biggest rival. “You have a tendency sometimes when you face a team over and over to try to change things.”

Four of those victories came against two-time NL Cy Young Award winner Tim Lincecum, with Kershaw allowing one earned run in those games. That came on an eighth-inning homer by Chris Stewart.

“It’s frustrating, obviously,” Lincecum said. “But when you go up against a guy like that who’s having a year like this, you’ve got to be on your game.”