While the San Francisco Giants appear to be heating up, the Milwaukee Brewers continue to struggle.
The Giants look to complete their second series sweep in three years of the Brewers at Miller Park on Wednesday.
Buster Posey and Joaquin Arias each hit two-run homers as San Francisco (23-20) won for the eighth time in 11 games, 6-4 over Milwaukee on Tuesday. The Giants, who have won four in a row against the Brewers this season, last swept a series at Miller Park from July 5-8, 2010.
San Francisco has outscored the Brewers 67-33 while winning 10 of 13 in Milwaukee.
The Brewers (17-26), who went 2 for 13 with runners in scoring position Tuesday, have dropped six of seven. The lone victory came in a 16-4 rout of Minnesota on Sunday, and they've totaled 17 runs in those six defeats.
"We're way too good to be playing like this," scheduled starter Marco Estrada told the Brewers' official website. "Things are going to change."
Posey, whose sixth home run hit the scoreboard, has homered and drove in three runs in each of the first two games of the set. He's 9 for 22 (.409) with 10 RBIs in his last six contests overall, and 12 for 24 with six home runs and 15 RBIs in six career games at Miller Park.
However, it's expected that Posey will be rested Thursday, and Friday will mark the one-year anniversary he was lost for the 2011 season with an ankle injury suffered during a collision with the Marlins' Scott Cousins.
"His ankle's not a factor," manager Bruce Bochy said. "He did a nice job both behind the plate and swinging the bat. I was a little concerned today that it would be a little cranky, but it wasn't at all."
Arias, playing in place of injured third baseman Pablo Sandoval, connected for his first career home run since breaking in with Texas in 2006.
Though Barry Zito (3-1, 3.00 ERA) was not at his best in his last outing, he'll try to win his third consecutive start in the series finale. The left-hander had not allowed more than three runs in any of his previous seven starts before he yielded four in 5 1-3 innings of an 8-6 win over Oakland on Friday.
He is 2-3 with a 5.48 ERA in eight starts versus Milwaukee, but has not faced the Brewers since 2010.
Ryan Braun, 5 for 13 (.385) with a double, triple and three home runs versus Zito, singled and drove in a run Tuesday for Milwaukee. The reigning NL MVP is batting .395 with 10 RBIs during an 11-game hitting streak.
Teammate Jonathan Lucroy has hit .412 in his last 19 games.
Estrada (0-3, 4.63) allowed four runs in five innings of an 11-3 loss to Minnesota on Friday to fall to 0-3 with a 4.97 ERA in five starts since replacing the injured Chris Narveson in the rotation.
Though the right-hander is making his first start against the Giants, he's pitched 1 2-3 scoreless innings in two relief outings versus San Francisco.