WASHINGTON (AP) -- Jhoulys Chacin pitched effectively into the seventh inning, Travis Shaw hit a two-run homer and the Milwaukee Brewers beat the Washington Nationals 4-1 on Friday night.

   During the game, the teams worked out a trade that sends pitcher Gio Gonzalez from the Nationals to the Brewers. The left-handed starter, who has struggled in 2018, will be a free agent in the offseason.

   The Brewers also got home runs from Jesus Aguilar, his 31st, and Erik Kratz in winning their third straight game. Milwaukee holds the second NL wild card spot.

   Chacin (14-5) allowed a run on six hits while striking out six and walking two in 6 1/3 innings.

   Jeremy Jeffress pitched the ninth for his eighth save in 13 opportunities. With a hard rain falling, the Nationals loaded the bases with one out, but Jeffress struck out Bryce Harper and got Anthony Rendon on a fielder's choice.

   Trea Turner had three hits for Washington, which went 1 for 15 with runners in scoring position.

   Tanner Roark (8-14) allowed four runs on six hits over six innings. Roark came in 5-1 with a 1.61 ERA in his past seven starts, but the Brewers homered in each of the first three innings against him.

   Shaw connected for a two-run shot with two outs in the first, Kratz hit a solo home run in the second and Aguilar connected with nobody on in the third.

   Nationals catcher Matt Wieters was ejected in the sixth inning for arguing balls and strikes.

   MORE MOVES

   Brewers: Acquired LHP Xavier Cedeno from the Chicago White Sox in exchange for OF Bryan Connell and RHP Johan Dominguez, two minor leaguers. Cedeno is 2-0 with a 2.84 ERA in 33 relief appearances this season.

   Nationals: Sent RHP Ryan Madson to the Los Angeles Dodgers for RHP Andrew Istler. Madson was 5-5 with five saves and a 4.08 ERA in 69 games for Washington. Istler went 4-4 with a 2.37 ERA in 41 games (one start) between three levels of Los Angeles' minor league system.

   TRAINER'S ROOM

   Nationals: LHP Sean Doolittle (left toe inflammation) threw a simulated game Friday and is slated for another one Sunday or Monday. "I was a little bit inconsistent with my execution, but I was very happy with how the foot felt," he said. ... Manager Dave Martinez said Harper is still battling a cough, but the former MVP was back in the lineup after pinch hitting on Wednesday.

   UP NEXT

   Brewers: RHP Chase Anderson (9-7, 4.04) makes his second career appearance against Washington, the first being a 2014 loss while with Arizona.

   Nationals: RHP Stephen Strasburg (7-7, 4.14) makes his first start against Milwaukee since 2014. He's 0-2 with a 5.30 ERA in three games vs. the Brewers.