In a matchup of former Cy Young winners, Kershaw gave up five hits and three runs in three innings, while Felix Hernandez allowed three runs on nine hits over six frames for Seattle.
Both aces were making their final spring starts prior to Opening Day. Kershaw will open against the Giants on Monday at Dodger Stadium, while Hernandez is slated for his sixth Opening Day start the same night against the A's in Oakland.
Kershaw finished his spring with a 4.18 ERA in seven starts. He was replaced in the fourth by Ted Lilly, who gave up seven runs on six hits and three walks in 2 1/3 innings.
Hernandez threw 96 pitches in his final spring tuneup and had one walk, three strikeouts and hit a batter. His final ERA was 2.65 in four Cactus League starts.
Mariners manager Eric Wedge was ejected in the sixth inning for coming out to argue with the home-plate umpire after Hernandez expressed unhappiness over a called ball.
Mariners catcher Jesus Montero went 2-for-4 with an RBI single in the third and is batting .415, while Dustin Ackley tripled and scored in the fourth off Lilly and also went 2-for-4 on the day.
Minor League callup Nate Tenbrink broke things open for Seattle with a three-run double in the sixth that made it 9-3 and knocked Lilly out of the game.
The Mariners have been hitting well all spring and now have a club record 55 home runs with two games to go. The Mariners have gone deep in 30 of their 31 games and are tied for the third-most spring home runs by any Major League team in the past 20 years, trailing only the 1999 Cubs (62) and 2006 Royals (56).
Playing a lineup of nearly all backups, the Dodgers pushed a run across against Hernandez in the second on singles by Nick Buss and Alex Castellanos, with Buss scoring on a blooper to right field by Justin Sellers. Right fielder Michael Saunders short-hopped that ball and threw to second to force Castellanos as Buss crossed the plate.
Third baseman Jerry Hairston had two of the hits against Hernandez, going 2-for-3 with a double to hike his Cactus League average to .200 (8-for-40). Lilly had a two-run double in the sixth.
Up next for the Mariners: Hisashi Iwakuma will be on the mound as the Mariners close out their Cactus League season with a 12:05 p.m. PT game against the Cubs in Mesa. Iwakuma, who'll be the No. 2 pitcher in the rotation when the season opens next week in Oakland, is 2-0 with a 3.60 ERA in five outings this spring. Carter Capps and Lucas Luetge are scheduled to pitch in relief.