PHILADELPHIA — Bob Rigby boarded two flights and a hydrofoil boat, traveling 30 hours to meet the New York Cosmos in Sweden as their last-minute goalkeeper for a 1975 world tour. He grew up in Delaware County, was a substitute teacher while playing at Veterans Stadium for the Atoms, and was now standing behind Pelé in the tunnel of a European soccer stadium. “I remember looking out at the field, looking right over his head, his head steaming because it was really cold on a fall night over there, and I just remember, ‘Holy mackerel,’ ” Rigby said Thursday, hours after Pelé died in Brazil at 82….