Kramer retired from professional baseball after he was released by the Brewers last August, Rob Biertempfel of The Athletic reports.
Kramer was traded from the Pirates to the Brewers on Sunday in exchange for left-hander Nathan Kirby, Jake Crouse of MLB.com reports.
Kramer was reassigned to minor-league camp Monday.
Kramer (hip) was reinstated from the 60-day injured list and outrighted to the minors Friday, Alex Stumpf of DKPittsburghSports.com reports.
Kramer (hip) was placed on the 10-day injured list.
Kramer underwent hip surgery this week and will be sidelined for 4-to-6 months, Stephen J. Nesbitt of The Athletic reports.
Kramer is likely to start the 2020 season playing for Triple-A Indianapolis.
Kramer was recalled by the Pirates on Wednesday.
Kramer was optioned to Triple-A Indianapolis on Monday, Adam Berry of MLB.com reports.
The Pirates recalled Kramer from Triple-A Indianapolis on Sunday.