WASHINGTON (AP) - Mike Adams threw just one pitch. Moments later, he trudged off the mound.

Adams' slider to Michael Morse was hit to San Diego's bullpen, and while Morse and his Washington Nationals teammates celebrated a 2-1 win, the Padres were left with yet another bitter defeat.

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The loss was San Diego's sixth in seven games. They've scored just 13 runs in 10 games.

The Padres had just three hits - two singles in the first eight innings off John Lannan and a leadoff home run by Jason Bartlett in the ninth off Drew Storen.

Adams was the third Padres pitcher, and he quickly shrugged off the loss.

``He struck it pretty well, so it couldn't have been that good of a pitch,' Adams said.

``It happens. I'm not somebody that's going to go out there and put up zeros all year. It stings a little bit because of the situation and we lost because of it, but I'm not going to sit here and worry about it or get all upset.'

Storen (3-1), who blew his first save of the season when Bartlett his first home run to lead off the ninth, was the winner. He pitched 1 1-3 innings.

The win ended Washington's five-game losing streak.

John Lannan pitched brilliantly for the Nationals, going a season-high 7 2-3 innings, allowing just two singles.

``Their starter did great. He kept us off balance and pounded that strike zone,' Bartlett said. ``He got the first pitch strike I don't know how many times today. We tried to be aggressive, but it was just a matter of him hitting spots and keeping us locked down. So when we tied it up, we had the momentum. It had us pumped up. They countered it.'

Lannan had lost his previous four decisions, giving up 16 runs in his previous 20 1-3 innings. In the first eight innings, the Padres managed only singles by Chase Headley in the fifth and Alberto Gonzalez in the eighth. He struck out five and walked two and hadn't completed seven innings in any of his previous 10 games.

The teams combined for seven hits, befitting the two weakest hitting teams in baseball. The Nationals are batting .228 - the Padres two points lower.

Lannan sped through the first three innings, retiring all nine batters he faced. After he struck out Chris Denorfia to start the fourth, the game was stopped by rain for 47 minutes. Once play resumed, Lannan struck out Bartlett and walked Ryan Ludwick before retiring Jorge Cantu on a fielder's choice.

After Cameron Maybin tried to bunt for a base hit, but was called out at first in a play heatedly disputed by manager Bud Black, Headley singled up the middle for San Diego's first hit.

In the bottom of the fifth, Danny Espinosa broke a 1-for-15 slump with a home run to the visitor's bullpen in left field off Clayton Richard. It was Espinosa's seventh home run of the year and his first solo home run this season.

Richard, who has lost six of seven, pitched seven innings, allowing just the lone run and three hits. He struck out one and walked three.

``Losses are always tough, whether it's by one run in the bottom of the ninth or by more,' Richard said. ``When you lose, you think of all the what-ifs, and if you win, you enjoy it and move on to the next day.'

NOTES: Washington 3B Jerry Hairston was thrown out of the game in the bottom of the seventh inning. As he momentarily stepped out of the batter's box, Richard quickly threw a pitch and Hairston flew out to center. Hairston argued with home plate umpire Ed Hickox and was quickly ejected. ... San Diego placed INF Orlando Hudson on the 15-day disabled list with a strained left groin. They recalled INF Logan Forsythe from Triple-A Tucson. ... Padres C Nick Hundley (strained right oblique) is getting closer to going on a rehab assignment, Black said.