May 26, 1973: A roller derby triple-header at Shea Stadium involved contests between the Chiefs and the Bombers, the Pioneers and the Jolters, and finally the Chiefs and the Pioneers, in which the Chiefs prevailed. In this photo, a Jolter, left, struggled to keep his balance as Bob Hein of the Pioneers rolled past. “The fans hate me,” said Hein, who played with a broken cheekbone protected by a mask. “He had a fight and was penalized for ‘slugging,’”