Dodgers ace Kershaw back with a vengeance

Los Angeles Dodgers pitcher Clayton Kershaw (22) throws during the third inning of a baseball game against the Washington Nationals at Nationals Park, Tuesday, May 6, 2014, in Washington. AP

WASHINGTON — Los Angeles Dodgers ace Clayton Kershaw made a triumphant return to the mound on Tuesday after six weeks sidelined by a muscle strain in his upper back.

In his first start since the Dodgers’ season-opener in Australia on March 22, Kershaw pitched seven shut-out innings in an 8-3 Los Angeles victory over the Washington Nationals.

Kershaw gave up nine hits and struck out nine without a walk.

The left-hander threw 23-of-28 first-pitch strikes and didn’t give up an extra-base hit.

The Dodgers provided the reigning National League Cy Young Award winner — who inked a seven-year contract extension worth $215 million in January — with plenty of run support.

Hanley Ramirez went 3-for-5 at the plate with a home run and two runs batted in and Drew Butera belted a three-run homer in the victory.

Dee Gordon added two hits and a brace of runs scored, while Andre Ethier finished 2-for-5 with an RBI.

Los Angeles’ Yasiel Puig sat out a second straight game after his high-speed collision with the outfield wall on Sunday at Miami.