While working as a gym teacher in Miami, Sheridan paid for air time on WDER-FM on Sunday mornings.
[3] In 2007 he succeeded Lon McEachern as the main play-by-play commentator for the bodogFIGHT mixed martial arts promotion, calling fights alongside Paul Lazenby, Jeff Osborne and Royce Gracie.
Sheridan was born on April 2, 1944, in Boston, Massachusetts, after his parents moved to the United States from Ireland as toddlers.
[5] Sheridan graduated from Lexington High School and continued on to college (University of Miami) on a baseball scholarship.
By his own account, Sheridan wasn't very good at baseball and had only been brought on the team to fill a spot until a younger player arrived.
While working with Dundee, Sheridan got a chance to announce his first title fight which was between WBA heavyweight fighters Jerry Quarry and Jimmy Ellis in 1968.
In 1972, when he was only about 29 years old, Sheridan was offered an opportunity to work with Video Techniques broadcasting a world title fight between Frankie Otero and Ken Buchanan for the Lightweight Championship.
[11] Sheridan was an announcer at several notable fights throughout boxing's history, some of which include the Thrilla in Manila between Joe Frazier and Ali (which was the first heavyweight bout hosted in the Philippines), the heavyweight championship fight hosted in Japan between Mike Tyson and Buster Douglas,[11] as well as the rematch between Mike Tyson and Evander Holyfield where Holyfield's ear was bitten off.
Staying dedicated to his duties, Sheridan signed himself out against the recommendation of hospital staff, and returned to the arena in order to announce the historic fight.
Sheridan was the father of a son called Simon Edwards, who was born in Newham, London, England in 1980 and put up for adoption through the Catholic Children's Society.
In laler years he was a regular visitor to Bunratty village near Shannon Airport in Ireland where he lived for a short while and made many friends locally. "