In a couple of weeks, it will be half a century since Pelé made his debut for the New York Cosmos against the Dallas Tornado at Downing Stadium on Randall’s Island. The pitch was so embarrassingly threadbare that the club deployed a small army of volunteers to daub dirt patches with green house paint diluted with water. Alan Bodenstein was a ball boy pressed into service with a brush to try to make the place look more respectable for television cameras and the watching world. When the Brazilian eventually walked on to the field, the PELE above the number 10...