In 1994, Fosty wrote press releases for the Seattle Sounders FC sports information department.

[2] In 2003, Fosty released his first book with his brother George, Splendid is the Sun: The 5,000 Year History of Hockey.

[8] In 2013, the Fosty brothers' book Where Brave Men Fall: The Battle of Dieppe and the Espionage War Against Hitler, 1939-1942 pointed a damning finger at American and British news organizations, including Time and Life, accusing the publications of leaking the Battle of Dieppe pre-raid information to the Germans resulting in the deaths, woundings, and capture of over 4,300 American, British and Canadian soldiers.

[9] In 2022, LeBron James, Drake, Maverick Carter produced Hubert Davis' Toronto Film Festival award-winning documentary film Black Ice, based on the Fosty brothers' historical research discussing Black hockey history, racial justice, and diversity.

[14][15] Fosty is currently living in New York City and is the co-founder of the Society of North American Sports Historians and Researchers and founder and editor-in-chief of CardBiz.ca.