Mandela, a "Yankee," to Be Honored in Monument Park Paul G. Burnett/The New York Times Nelson Mandela donning his Yankees cap at the Stadium in 1990, with Mayor David Dinkins left of the podium. During Nelson Mandela's triumphant visit to New York in June 1990, shortly after he was released from a South African prison, one of his most memorable stops was a rally and concert at Yankee Stadium, where he donned a cap and jacket and proclaimed, "I am a Yankee." To commemorate that moment and the life of Mandela, the South African leader who died last week at age 95, the Yankees will place a plaque in Monument Park to be unveiled on Jackie Robinson Day, April 15, when the Yankees play the Chicago Cubs. Robinson, the three Popes who visited the stadium and the victims of the Sept. 11 attack are other non-Yankees to be honored at Monument Park, beyond the center field wall. Pope Paul VI in 1965, Pope John Paul II in 1979 and Pope Benedict XVI in 2008 led masses at the Stadium. The idea to honor Mandela came from the Service Employees International Union Local 32BJ, whose president, Hector Figueroa, called the Yankees" president, Randy Levine. The Yankees hierarchy - including the managing general partner Hal Steinbrenner, the chief operating officer Lonn Trost, the senior vice president Deborah Tymon and Levine - decided on the plaque in Monument Park. When Mandela visited a packed Yankee Stadium on June 21, 1990, the concert featured the musicians Richie Havens, Tracy Chapman, Mighty Sparrow and Judy Collins. He placed a Yankees cap on his head, Mayor David Dinkins draped a team jacket over his shoulders, and Mandela declared, "You know who I am. I am a Yankee. The Yankees owner George Steinbrenner, who is also honored in Monument Park, was said to have been so pleased with Mandela's declaration that he did not charge the city for having hosted the event. A soccer fan and boxer in his youth, Mandela long understood the importance of sports as politically unifying, which he demonstrated by enthusiastically supporting the South African rugby team in its 1995 World Cup championship drive, even though rugby had traditionally been a sport for the white South African minority. His proclamation that he was a Yankee, especially at a time when the team was in last place in the American League East, endeared him not only Steinbrenner, but to many local baseball fans as well.