The university on Thursday announced the gift from the Kansas City Sports Trust.
A release from the university says details of the new facilities are still in the planning process.
Director of Athletics Jim Sterk says in the news release the gift is an important starting point for fundraising for the football facility.
Originally, the university planned a football-only facility at Memorial Stadium but the project has grown into a proposed indoor practice field/student-center.
The Kansas City Trust is a group of anonymous donors living in or near Kansas City. It has already given Missouri athletics a $30 million gift in 2012 and another $10 million in 2004.