CHICAGO -- Matt Wieters hit a tiebreaking grand slam off Carl Edwards Jr. in Washington's five-run eighth inning, helping the Nationals beat the Chicago Cubs 9-4 on Sunday.
Bryce Harper started the winning rally with a one-out infield single against Mike Montgomery. Ryan Zimmerman doubled against Edwards and Daniel Murphy was walked intentionally to load the bases.
Washington then grabbed control in a span of two pitches. Edwards (3-3) hit Anthony Rendon, tying it at 4, and Wieters followed with a drive over the wall in center for his third career grand slam.
Wieters drove in five runs and Brian Goodwin homered for the NL East-leading Nationals, who had dropped three of four.
Willson Contreras homered twice for NL Central-leading Chicago. The Cubs closed out a 2-4 homestand against contenders Arizona and Washington before pulling on leather vests and bandanas for their "Easy Rider"-themed six-game road trip out west (see full recap).
Souza hits walk-off homer to lift Rays over Brewers
ST. PETERSBURG, Fla. -- Steven Souza Jr. homered off Milwaukee reliever Jacob Barnes leading off the ninth inning Sunday to lift the Tampa Bay Rays to a 2-1 win over the Brewers.
Souza's 24th home run helped the Rays salvage a win in a three-game series in which they scored only two runs. It was Souza's first walkoff homer with the Rays.
Most of the game was a pitchers' duel between the Rays' Chris Archer and the Brewers' Jimmy Nelson.
Tommy Hunter (1-2) got the win after tossing 1 1/3 innings of relief.
Barnes (3-3) threw only two pitches in relief of Nelson, who gave up one run on six hits while striking out nine in eight innings (see full recap).
Astros stun Blue Jays with four-run 9th
HOUSTON -- Juan Centeno hit an RBI single with two outs that capped a four-run rally in the ninth inning, lifting the Houston Astros over the Toronto Blue Jays 7-6 Sunday.
Jose Altuve singled off All-Star closer Roberto Osuna (3-3) to begin the Houston ninth and one-out singles by Yuli Gurriel and Marwin Gonzalez loaded the bases. Carlos Beltran grounded into a forceout that scored a run, and Alex Bregman hit a tying, two-run triple.
Centeno followed with a liner over the head of leaping first baseman Justin Smoak and into shallow right field to win it for the AL West leaders.
Nori Aoki had a two-run homer, his first hit since being traded from Houston to Toronto last Monday, during a four-run seventh that gave the Blue Jays a 6-3 lead.
Francis Martes (4-1) pitched 1 2/3 scoreless innings for the win. Osuna allowed five hits and four runs while getting only two outs for his seventh blown save this season (see full recap).