The Milwaukee Brewers won't play at Miller Park after next year.
American Family Insurance will take over the naming rights to the stadium in 2021 under a 15-year agreement.
"This is a relationship with a very sophisticated Fortune 500 company that will widen our brand and it's a collaboration between two dynamic companies with a passion for sports in our community," Brewers CEO Rick Schlesinger said.
MillerCoors, which has a brewery located just a mile from the stadium, committed $41.2 million for the naming rights in March 1996, nine months before ground was broken.