After throwing 56 pitches and surrendering two runs in the first three innings, Robertson (7-3) settled down and gave up three hits and walked two over the next four.
"Our bullpen has been throwing a ton," Robertson said. "I wanted to take the ball and go as deep into the game as I could. I made decent pitches when I needed it. It was a struggle all the way through."
The 26-year-old lefthander served up a solo homer to
with one out in the eighth, but
yielded one hit over the final 1 2/3 innings for his third save.
Robertson extended his personal winning streak to six games, is unbeaten in his last 12 and leads the Astros with seven victories. His effort came one night after Houston used eight pitchers in a 5-3, 11-inning loss to Milwaukee.
"You hope for that every day, regardless of how many relievers you used the night before," Astros manager
said. "You always like to see your starters go deep in the game. He stayed with his composure. He settled in right after the first couple of innings and pitched pretty good. He got in the strike zone more consistently after the third inning."
The Astros remain tied with St. Louis for first place in the National League Central, one game ahead of the
"Wins in our division are always big," Houston second baseman
said. "Last night was a tough loss. Now we head to Pittsburgh, where we've played well before. We've built some confidence and hopefully, we can get on a little streak."
put the Astros on board in the third inning with a three-run homer and Blum hit another to right in the fifth to give Houston a 6-2 lead.
"The first one was a one-handed Minute Maid Park home run," Milwaukee manager
said. "It's just a fly ball, but Bagwell's strong. When you give up solo home runs, that won't kill you. The walks before the home runs are what hurt us."
was a lone bright spot for Milwaukee. He singled in the seventh to extend his hitting streak to 12 games - the longest by a Brewer this season.
(6-7) was reached for six runs and five hits in six innings for Milwaukee, which has lost four of five.
With one out in the top of the second inning,
singled, took third on a double by
and scored on a sacrifice fly by
center to give the Brewers a 1-0 lead.
Young drew a leadoff walk in the third and
singled. Young moved up on a groundout by
and made it 2-0 on a sacrifice fly by Sexson.
Houston took the lead for good in the bottom half.
drew a two-out walk and Blum singled ahead of Bagwell's 15th home run.
"There were two innings where I didn't throw very well," Kinney admitted. "Walks will kill you. The guys played great behind me and I just didn't get it done."
Two innings later, Blum added his second homer in three games.
"I think he missed his spot with a fastball and I hit it deep into right field," Blum said. "I haven't been driving the ball lately, but this series I've been working on my swing and I got pitches to hit."
padded the Astros' lead in the eighth by singling in Bagwell.