Johan Fredrik "John" Olin (June 30, 1883 – December 3, 1928) was a Finnish wrestler who competed in the 1912 Summer Olympics. He won the silver medal in the heavyweight class.In 1916, Olin captured a claim to the World Heavyweight championship after a controversial bout with Joe Stecher in Springfield, Massachusetts. On December 12, 1916, In one of the great forgotten matches and upsets in wrestling history, he defeated Stecher.