Who knew that there was an actual person who invented the triathlon. Well maybe I should say persons. But Jack Johnstone, one of the sport's co-founders, is dead.
http://www.runnersworld.com/obituary/triathlon-cofounder-jack-johnstone-dies-at-80
The first triathlon had a different order - running, biking, and swimming. Johnstone was a former All-American swimmer so that makes sense.