Pittsburgh Steelers running back DeAngelo Williams is following through on a promise he made to Charlotte months ago.

Williams on Saturday is hosting an event in Charlotte -- where he played nine seasons for the Panthers -- to provide women from low-income, non-insured or under-insured families with mammograms. In 2014, Williams' mother, Sandra Hill, died of breast cancer at age 53. Williams honors his mother's age with the number of tests.

Williams is the NFL's most outspoken champion for this cause, and in October he told ESPN he had planned on purchasing the 53 tests in Charlotte, and eventually in Pittsburgh. According to the Charlotte Observer, the DeAngelo Williams Foundation is making that happen with a $10,000 donation.

And he's not done. Williams, who also hosted a similar event in Pittsburgh during the season, will provide 53 mammograms in Memphis (where he went to school) and Jonesboro, Ark. (where his mother underwent chemotherapy).

Williams had planned to wear pink accessories on his uniform throughout the 2015 season, but the NFL's uniform policy won't allow it.

"It's not just about October for me," Williams told ESPN's Lisa Salters in October before a Monday Night Football game with San Diego. "It's not just a month, it's a lifestyle. It's about getting women to recognize to get tested."