CINCINNATI -- Ryan Zimmerman set the Nationals' career home run record with a solo shot, and Bryce Harper connected again on Monday as Washington powered its way to a 6-1 victory for a four-game sweep of the Cincinnati Reds.
Zimmerman's 235th career homer moved him ahead of Vladimir Guerrero for most in Expos and Nationals history.
Washington improved to a season-high 20 games over .500 (56-36) with its ninth victory in 11 games.
Stephen Strasburg (10-3) recovered from his shortest start of the season by fanning 11 in seven innings and allowing four hits, including Eugenio Suarez's homer.
Scott Feldman (7-7) lasted only one inning. He gave up a double, a single, Harper's three-run homer and Zimmerman's solo shot in his first 12 pitches. Feldman left after facing nine batters and giving up five runs on 33 pitches (see full recap).
Seager, Valencia HRs lift Mariners to win
HOUSTON -- Kyle Seager and Danny Valencia hit back-to-back homers in the 10th inning to lift the Seattle Mariners to a 9-7 win over the Houston Astros on Monday night.
The wild back and forth game was tied at 7-7 entering the 10th when Seager, who finished with three hits, connected off Tony Sipp (0-1) on a shot to the seats in right field. Valencia added an insurance run when he launched a slider to center field three pitches later.
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Mike Zunino and Nelson Cruz also homered for the Mariners as they tied a season high with four homers to win their fifth straight game.
Yovani Gallardo (4-7) allowed two hits in a scoreless ninth for the win and Edwin Diaz struck out two in a scoreless 10th for his 17th save.
Cruz tied it in the seventh and Zunino put Seattle on top with his homer in the eighth. A sacrifice fly by George Springer scored a run to tie it at 7-7 in the bottom of the eighth.
Jake Marisnick and Carlos Beltran both homered for the Astros on a night when All-Star shortstop Carlos Correa left in the fourth inning after jamming his left thumb on a swing (see full recap).
Lester strong as Cubs hold off Braves
ATLANTA -- Jon Lester bounced back from the shortest start of his career by allowing only one run in seven innings and Chicago stopped Atlanta's ninth-inning comeback to give the Cubs a 4-3 win over the Braves on Monday night.
The Cubs led 4-1 before Atlanta scored two runs in the ninth off closer Wade Davis and loaded the bases with two outs.
Davis allowed one-out singles to Brandon Phillips and Freddie Freeman before Phillips scored from third on a wild pitch. Matt Kemp followed with a run-scoring single before pinch-runner Lane Adams stole second and moved to third on Tyler Flowers' fly ball to the warning track in center field.
Following an intentional walk to pinch-hitter Matt Adams, pinch-runner Dansby Swanson stole second, leaving runners on second and third. Davis walked Sean Rodriguez, playing in his first game of the season, to load the bases.
Johan Camargo's fly ball to shallow left ended the game, giving Davis his 18th consecutive save this season (see full recap).