BOSTON -- Scoring three runs in the seventh inning without recording a hit, the Boston Red Sox rallied for a wild, 8-7 win over the Washington Nationals on Tuesday night.

Boston erased a 7-5 deficit by scoring twice on two errors on the same play by Washington reliever Blake Treinen. A groundout by shortstop Brock Holt drove in the winning run.

Second baseman Dustin Pedroia went 3-for-4 with a homer, center fielder Mookie Betts hit a two-run double, and Boston's bullpen tossed 4 1/3 scoreless innings to lead the Red Sox to their fifth win in the past six games.

Edward Mujica (1-0) picked up the win with 1 1/3 innings of relief. Closer Koji Uehara pitched a perfect ninth for the save in his first appearance of the season after being activated from the disabled list Monday.

The Red Sox jumped in front 5-1 in the fourth, but they allowed six runs in the fifth, falling behind on center fielder Michael A. Taylor's two-run triple.

Treinen (0-1) gave the lead back in the seventh.

After Hanley Ramirez reached on an error, Matt Thornton hit right fielder Shane Victorino with a pitch and Treinen plunked pinch hitter Allen Craig. Catcher Ryan Hanigan then bounced a short chopper in front of the mound, where Treinen dropped the ball, allowing Ramirez to score.

Treinen made another mistake, scooping the ball and throwing wildly into the stands while trying to catch Victorino at the plate.

Shortstop Ian Desmond had three hits for the Nationals, who lost for the fifth time in six games.

Washington starter Stephen Strasburg yielded five runs on 10 hits in 5 1/3 innings. The right-hander struck out five.

Taylor's RBI single in the second gave Washington the lead, but Betts put Boston in front with a two-run double in the bottom half.

Boston stretched its lead to 5-1 in the third on RBI singles by right fielder Daniel Nava and Hanigan, plus Pedroia's third homer of the season, on a first-pitch fastball from Strasburg.

The Nationals chased Red Sox starter Justin Masterson during a six-run fifth, a rally highlighted by Desmond's two-run single that tied the score at 5 and Taylor's go-ahead, two-run triple off reliever Alexi Ogando.

Masterson allowed seven runs on eight hits in 4 2/3 innings. The right-hander struck out four, walked three and hit two batters.

NOTES: Boston 3B Pablo Sandoval left the game following the fifth inning after being hit on the top of his left foot by a Stephen Strasburg pitch in the third. ... Both starters, Washington RHP Stephen Strasburg and Boston RHP Justin Masterson, pitched for San Diego State University. ... Boston SS Xander Bogaerts, who is batting .433, was held out of Tuesday's game after undergoing an MRI exam on his right knee, which he injured Monday against Washington. Brock Holt started in his place and went 2-for-4. ... Washington called up RHP Rafael Martin and designated LHP Xavier Cedeno for assignment.