Reitman fought as a professional heavyweight boxer while working full-time as an orthopedic surgeon, and was widely referred to as the Boxing Doctor during his career.

In his first year of medical school, Reitman surprised classmates and faculty by entering the 1971 New England Golden Gloves championships in Lowell, MA as a heavyweight.

[4] He graduated from Boston University School of Medicine in 1974 and began an internship at St. Joseph's Regional Medical Center in Paterson, NJ.

A specialist in arthroscopic knee surgery and sports medicine, Reitman served as senior surgeon and CEO, expanding the practice throughout South Florida.

Reitman made a personal vow to revive his boxing career in order to raise money for children's charities.

[8] At that time, the Florida State Athletic Commission only allowed boxers to fight up to the age of 35 and turned Reitman down in his first attempt to acquire a professional boxing license.

On February 15, 1991, with a professional record of 7-1-1, Reitman fought a three-round charity exhibition match against the five-time world champion Roberto Durán at the Hollywood Diplomat Hotel in Miami Beach.

[11] On November 11, 1991, Reitman fought heavyweight Tim Anderson for the NBA Independent Cruiserweight title in a televised fight.

In December 2000, Reitman fought Kenny Lunkins in a scheduled 10 round main event at War Memorial Auditorium in Fort Lauderdale, FL.

[14] In 2010, Reitman wrote, produced, and co-directed the feature length independent film, The Square Root of 2, starring Darby Stanchfield.

[19][20] His non-fiction work, Aspertools: The Practical Guide for Understanding and Embracing Asperger's, Autism Spectrum Disorders, and Neurodiversity, included his review of the scientific community's research conducted over the last nearly 40 years, and was published by HCI Books[21] on April 7, 2015.

In 2015, he founded DifferentBrains.org, a non-profit organization developed to provide neurodiversity resources and inclusive support communities for those on the autism spectrum or with neurological disorders.