Puzzled by some Olympic events? The games once included swimming obstacle races, croquet, rugby, tug of war and native mud fighting. (Illustration by Sam Island | Op-Ed by Bill Mallon on Bloomberg View)

Puzzled by some Olympic events? The games once included swimming obstacle races, croquet, rugby, tug of war and native mud fighting. (Illustration by Sam Island | Op-Ed by Bill Mallon on Bloomberg View)