The board includes the nephew of former mayor Richard Daley.
The Sun-Times says Peter Thompson will be removed, along with banker Alvin Boutte and attorney William Power. Replacing them is businessman Jim Reynolds, former school president Norm Bobins and businessman Chris Melvin.
The mayor has reportedly charged all three with reforming with the stadium authority, and making the agency more accountable to city and state taxpayers. None of them will accept free food or beverages, special parking privileges, or access to skyboxes.
The move could lead to renegotiation of the White Sox lease at U.S. Cellular Field, and it could revive a failed plan to have the state acquire and renovate Wrigley Field.