Rex made $15 million (I figured it would be more, but I guess he played in an era where starting QBs didn't make $25 million+). This article said he started a nursing company:
Bears Bust Rex Grossman Turned His $15 Million Into A Nursing Company
Bears Bust Rex Grossman Turned His $15 Million Into A Nursing Company - Sportscasting | Pure Sports
Rex Grossman retired with over $15 million in career earnings. Over $10 million of that came from his six seasons in
Chicago.
During Grossman’s playing days, he and his wife, Alison, founded
Florida Medical Staffing in 2009.
Located in Delray Beach, Fla., the company “specializes in providing skilled temporary and permanent staff to the medical community, including hospitals, skilled-care facilities and other medical providers,” according to its website.
Those were always crucial ways to help those in the medical field. During the coronavirus pandemic, Florida Medical Staffing’s role is even more important.