Santana got the Brewers on the board with his fifth home run of the season off Pirates starter Steven Brault. The 24-year-old, who hadn't homered since coming off the disabled list on Aug. 19, went yard again in the ninth.
"It felt good," Santana offered. "It just feels good to hit one. I'm just fortunate to hit two."
The Brewers' biggest blow of the game came in the sixth inning, when Jonathan Villar pinch-hit for starting pitcher Chase Anderson. The infielder didn't appear on Saturday due to a sore left knee that stemmed from a slide on the bases on Friday, but was deemed healthy enough to hit.
After a Jake Elmore walk loaded the bases, Villar faced Pirates reliever Juan Nicasio. With the count 2-2, Villar hit the sixth pitch of the at-bat, all of which were fastballs, into the left-field seats, giving Milwaukee a 5-0 lead.
"I've been ready for that pitch, because he throws hard," Villar said. "I was waiting for a fastball."
Then in the ninth, Carter put the game out of reach, if it wasn't already. The Brewers' slugger hopped on a 2-0 fastball and hit it out to center field for his 32nd home run of the season and second in as many games.
"We had some big hits," Carter said. "Villar's home run was huge for us in a one-run game and that made it 5-0, that was big."
Santana followed Carter's three-run blast with his second solo homer of the day to give the game its final line, 10-0.