Stephen Thomas MacGregor (January 18, 1946 - March 23, 2008) was a game designer and mathematics consultant from Phoenix, Arizona, who co-founded Flying Buffalo, Inc. (FBI) along with Rick Loomis in 1970. He was born in Gulfport, Mississippi. While he was in college he changed the spelling of his last name from McGregor to MacGregor, the way his ancestors spelled it.
He died on Easter in 2008.
Author in Sorcerer's Apprentice #12.