A two-run homer by Gregory Polanco in the eighth inning gave the Pittsburgh Pirates a 5-4 win over the Milwaukee Brewers on Sunday and a sweep in the three-game series.

Polanco hit David Phelps (2-3) with his fourth home run of the season and ended up batting 3-2 on a walk. It was Polanco’s second two-hit game in as many days, to improve his batting average from .085 to .151.

The Pirates nearly doubled their season win total in just one weekend. They entered the series with a 4-17 record, the worst in the major leagues.

Cole Tucker started the winning streak with a one-out single and Polanco followed up with a hit to bottom center field one out later.

For Milwaukee, Justin Smoak hit a two-run home run in the sixth inning that put his team up 4-2. He finished with two hits and three RBIs.

Chris Stratton (1-0) pitched an eighth scoreless inning for the win, while Richard Rodriguez delivered a perfect job in the ninth in his first save of the season and second in his four-year career.

For the Pirates, the Dominicans Érik González 4-1 with scored, Polanco 3-2 with two runs scored and two RBIs. Venezuelans José Osuna 4-0.

For the Brewers, the Venezuelan Avisaíl García 5-1, Omar Narváez 4-2 with an RBI, and Orlando Arcia 3-0. The Mexican Luis Urías 3-1 with scored.