Served in the 442nd Regimental Combat Team. His war experiences are included in the book "I Can Never Forget: Men of the 100th/442nd," by Thelma Chang. Roy boxed as a Featherweight as a young man in Hawaii and even during his Army days (Worldwide Bantamweight Champion). He won nine major individual crowns as bantamweight and featherweight with over 90 bouts during his career in the ring. Later, in the Air Force, he coached the Air Force team to a number of championships, several Pan American Trials and was involved with the U.S. Boxing team in the Olympic Trials in the 1960's.