As of Thursday afternoon, the Brewers were in the low 30,000s for presale tickets purchased for the Friday series opener, and just shy of 40,000 for the Saturday and Sunday games. Sunday is George "Boomer" Scott bobblehead day at the 42,000-seat ballpark.
And in terms of allegiances, the Brewers have noted many more buyers from Wisconsin zip codes than Illinois -- about 80 percent to 20 percent, Schlesinger said.
This was not always the case.
"It was a tough ticket to get, obviously, in the 2005-08 period, when the Cubs were playoff-contending and selling out Wrigley Field, and our team was in transition," Schlesinger said. "The ballpark had a lot of Cubs fans, and they were wearing their Cubs colors, and candidly, a lot of our Brewers fans felt that the Cubs fans were invading and creating what they would call 'Wrigley Field North.'"
Schlesinger and other club officials heard from fans who were so put off by the "road game" atmosphere that they stopped attending games against the Cubs.
The club's worry, Schlesinger said, is that those fans are still staying away, even though the atmosphere has changed.
"The Brewer fans are the majority," he said. "It's become much more of a 'home' feel to the games, which is what we want. My message is that if you're a Brewers fan and you want to see the Brewers play the Cubs at Miller Park, you're going to be among friends."
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.