SAN DIEGO (AP) -- Adam LaRoche hit two towering home runs and Chad Tracy's solo shot in the 10th inning lifted the Washington Nationals to a 6-5 victory over the San Diego Padres on Friday night.
Tracy's seventh career pinch-hit home run negated a blown save from closer Rafael Soriano, who gave up two runs with two outs in the ninth.
The Padres tied the game with three straight singles. Chase Headley's RBI made it 5-4 and Yonder Alonso pushed him to third with another single. Kyle Blanks evened the score with another single, which sent the game into extra innings.
It was Soriano's second blown save in 14 chances. Drew Storen got his first save of the season in the 10th.
Tracy's home run came off Padres closer Huston Street (0-3), who has allowed six home runs in 17 1-3 innings. He gave up two in 39 innings last season.
While Tracy saved the day, LaRoche carried Washington's offense through the first nine. The first baseman extended his hitting streak to 14 games with a three-run shot 431 feet to deep center in the fourth and hit his second 403 feet in the sixth inning. LaRoche's second blast followed Ryan Zimmerman's home run, which just cleared the right-field wall.
It was LaRoche's 21st multi-homer game and his second this season.
The Nationals took advantage of Padres right-hander Burch Smith, making his second professional start. The 23-year old gave up five runs on six hits in 5 1-3 innings. He struck out eight and walked just one.
The long ball got Smith in trouble, but it was still an improvement over his professional debut.
Smith gave up six runs on five hits in one-plus innings in a no-decision at Tampa Bay on May 11. He pitched a perfect first, but couldn't get an out in the second and left the game with five runs in and the bases loaded.
The 23-year was promoted from Double-A San Antonio, where he posted a 1.15 ERA and flashed an explosive fastball that can reach 100 mph.
The Padres gave their prized young prospect a second chance on Friday, and asked him to throw more breaking pitches. Burch did so at times and kept Washington's offense at bay early on.
Washington sat on Smith's fastball and eventually caught up with it.
The Nationals hit three home runs off Smith's best pitch, which erased an early deficit.
The Padres scored twice in the first inning, once on a single from first baseman Kyle Blanks and again on a throwing error from right fielder Bryce Harper. Harper gathered Blanks' hit cleanly but his throw went wide of third base and into the stands, allowing Jesus Guzman to score.
Nationals starter Gio Gonzalez got stronger as the game went on, and allowed three runs - two earned - in 6 2-3 innings. Gonzalez walked three - two in the first inning - struck out five, and retired 10 straight at one point. Gonzalez hasn't exceeded two earned runs in three straight starts.
Jedd Gyorko hit a solo home run off him in the sixth which cut the lead to 5-3.