Apr 16, 2014; Apr 16, 2014; (Left to right) Lindo and Zondwa Mandela (Nelson Mandela's grandson) and Hal Steinbrenner pose with the photo of Monument Park plaque at the press conference honoring Nelson Mandela plaque dedication at Yankee Stadium. Mandatory Credit: William Perlman-The Star-Ledger; Mandatory Credit: SL