Bryce Harper has seen a lot one game into his career, and no game against the Dodgers would be complete without a dose of heroism from Matt Kemp.

Kemp upstaged Harper's debut with a bomb to center field off Tom Gorzelanny in the 10 th inning to lift the Dodgers to a 4-3 victory against Washington on Saturday night.

It was Kemp's fifth career walk-off home run, his MLB-leading 11 th homer of the season and a cathartic conclusion for a captivated crowd of 54,242 at Dodger Stadium.

"That's the Dodger Stadium I remember from two, three years ago," Kemp said.

The Dodgers (15-6) overcame a 3-1 deficit with two runs in the ninth inning and edged one game ahead of Washington (14-7) for the National League's best record.

Harper, under national media scrutiny and with his parents sitting in the stands, delivered a strong debut performance in going 1 for 3 with a double and a sacrifice fly. The first overall pick of the 2010 draft also remained calm when a fan hopped out of the right-field seats, ran across the grass pointing at him and was tackled by security guards in left-center field.

But it was Kemp and Juan Uribe who made the difference in the end.