MILWAUKEE (WSAU-TSN)  Marco Estrada tossed eight scoreless innings, Corey Hart homered twice and the Milwaukee Brewers kept their slim playoff hopes alive with a 9-5 win over the Houston Astros on Saturday.

The Brewers are now 4 1/2 games behind the St. Louis Cardinals for the NL's final wild card spot. The Cardinals, who lost to the Washington Nationals, can eliminate Milwaukee from playoff contention with a win on Sunday.

Estrada (5-7) struck out 11, issued just one walk and scattered four hits to earn the victory. Livan Hernandez allowed three ninth-inning homers before Jose Veras recorded the game's final out.

Aramis Ramirez and Norichika Aoki both had three hits, two RBI and two runs scored for the Brewers, who dropped a 7-6 decision to the Astros in Friday's series opener.

Dallas Keuchel (3-8) allowed seven runs on eight hits over just 2 1/3 innings to take the loss on Saturday. The rookie left-hander walked one and struck out two.

Fernando Martinez and Brian Bogusevic both belted two-run homers for Houston in the ninth and Tyler Greene added a solo blast.

The Brewers and Astros play again Sunday at 12:35pm on Fox Sports 1390.