Though not a champion "The Punching Postman" Tony Thornton worked as a full time letter carrier for the U.S. Postal Service during his career.
The late pugilist never won a world title but was good enough to fight Chris Eubanks, James Toney and Roy Jones Jr. in world title bouts.
forget the name of the rican dude from massachusetts who had a strap at WW while working as a one of those cops in a court house ... very ordinary fighter.