WASHINGTON (AP) - Thirty minutes after the worst defeat of Davey Johnson's first week as the new Washington Nationals manager, he was walking around the clubhouse trying to make sure no one else was injured.

Johnson watched his team lose to the Pittsburgh Pirates 10-2 on Sunday - and that was hardly the worst of it.

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Jayson Werth, who was loudly booed in the second game of Saturday's doubleheader, took a pitch on his left arm and had to leave Sunday's game. Michael Morse sat out after he was hit by a pitch in his left forearm on Saturday night.

``I'm real concerned about it,' Johnson said about the spate of injuries. ``Nobody's 100 percent.'

Werth and Morse are unlikely to play Monday, and Johnson wants to make sure Ryan Zimmerman doesn't get hurt again. Zimmerman, who missed 58 games after a left abdominal tear, is on his manager's mind, too.

``Truth be told, I'd like to give my third baseman a little time off. I don't want to push that to where he has a problem,' Johnson said.

By the time Werth was hit in the sixth inning, the Nationals were already trailing by eight runs. Werth continued to struggle at the plate, striking out with two outs and two men on base in the first and flying out to center with a runner on base in the third to drop his batting average to .223.

The fans' tepid reaction was much kinder than it was on Saturday, when he was booed loudly during the second game of a doubleheader.

He declined to speak to reporters for the second straight day.

``He's a tough guy. He's real sore. He didn't want to get X-rayed,' Johnson said. The Nationals said Werth didn't get X-rayed.

Others who have been fighting nagging injuries include Laynce Nix and Ian Desmond. Rick Ankiel just returned Friday after he missed 14 games with a strained rib cage muscle.

Pittsburgh scored three runs in the first and five in the second on its way to giving Kevin Correia his 11th win of the season and earning a split in their four-game series with Washington.

The Nationals again fell below .500 and dropped to 2-5 under Johnson. Washington has already allowed 10 or more runs twice under Johnson, matching the number of times it happened in 78 games under Jim Riggleman and John McLaren.

``I don't like to get beat,' Johnson said. ``It wasn't any fun today.'

Correia (11-6) allowed two runs and six hits over six innings to become the first Pirates pitcher to win 11 games before the All-Star break since Jim Bibby in 1980.

Correia is tied for the majors lead in wins with Jair Jurrjens, Roy Halladay, C.C. Sabathia and Justin Verlander, and his nine road victories are tops in baseball.

Pittsburgh's 10 runs matched a season high as the club moved two games over .500 for the ninth time this season, where it keeps hitting a barrier that so far has stopped it. The Pirates are 0-8 when trying to get to three games over.

The Pirates sent eight batters to the plate in the first inning and nine in the second. Andrew McCutchen finished with three hits and would have had four were it not for Roger Bernadina's diving catch on the warning track in the left field corner. McCutchen had nine hits in the series, including six for extra bases, to raise his average to .294.

The Pirates battered Jason Marquis (7-3), who lost for the first time in eight starts. He lasted only 1 1-3 innings, allowing seven runs and eight hits.

``It's one of those days,' Marquis said. ``I'm obviously not happy about it, but it's one start.'

The Nationals had two offensive highlights: a two-run homer by Wilson Ramos and an infield hit from 43-year-old first baseman Matt Stairs, who was starting in the field for the first time since April 12.

NOTES: Tyler Clippard was selected as Washington's representative to the NL All-Star team. Clippard didn't figure he'd have much of a shot because he's a setup man, but he has 57 strikeouts, 15 walks and a 1.96 ERA for the Nationals. He has allowed only 6 of 31 inherited runners to score. ``I knew there was maybe an outside shot,' Clippard said. ``But I didn't really take it seriously and maybe that's probably a good thing.' ... Morse will be on a fan ballot to determine the final NL All-Star spot.