LOS ANGELES — Andre Ethier still has a hard time believing his uncanny ability to generate game-winning hits.

Ethier hit a two-run homer in the 13th inning — his major league-leading sixth walkoff hit of the season — giving the Los Angeles Dodgers a 5-4 victory over the Pirates Tuesday night.

"You pinch yourself," he said. "If there's a heartbeat left, we can come back and try to win it. I was just looking for a good pitch to hit and put a good swing on something."

Four of Ethier's game-ending hits have been home runs, the latest gave the Dodgers their 37th comeback win of the season and earned him a curtain call. The NL West leaders moved five games ahead of Colorado, which lost 10-2 at San Francisco, and had their magic number to clinch a playoff berth reduced to 10.

"As Yogi would say, `It's déjà vu all over again,"' Dodgers manager Joe Torre said, quoting former New York Yankees catcher Yogi Berra. "You've seen him do it, you want to visualize it, and when he does it, it's just surreal."

Ethier sent the first pitch from Phil Dumatrait (0-1) into the right field pavilion with one out for his 30th homer and 97th and 98th RBI of the season. Rafael Furcal opened the inning with a line drive single that struck Chris Bootcheck on the right leg and ricocheted between first and second base.

The Pirates had taken a 4-3 lead in the top of the inning on Ryan Doumit's RBI single. The go-ahead run was unearned because of a throwing error by third baseman Casey Blake on Andrew McCutchen's routine grounder. Andy LaRoche sacrificed McCutchen to second before Garrett Jones was intentionally walked. Doumit faced an 0-1 count from Ronald Belisario (4-3) before he singled to left, scoring McCutchen.

"It was a great game," Pirates manager John Russell said. "We thought we had it won twice. Unfortunately, they're a great team and they've had a lot of comeback wins this year."

The Dodgers wasted a golden opportunity in the 12th after pinch-hitter Juan Pierre tripled with one out off Steven Jackson. The Pirates pulled the infield in and Orlando Hudson grounded out to second before pinch-hitter James Loney grounded out to first.

Los Angeles tied the game 3-3 in the ninth on Matt Kemp's RBI single off Matt Capps, whose blown save was his fifth in 30 chances.

"If I get that last pitch down to Kemp, he swings over it and it's a ground ball. But I missed up in the zone and you can't afford to do that," Capps said. "We should have won that game in the ninth."