Nico Ali Walsh, Muhammad Ali's grandson, stayed unbeaten in his boxing career Saturday night with a victory at Madison Square Garden, where The Greatest fought some of his most memorable bouts. Richard Torrez Jr. and Duke Ragan, who won silver medals for the U.S. last year in the Olympics, also were winners on the undercard of Vasiliy Lomachenko's match against Jamaine Ortiz. Ali Walsh (7-0) beat Billy Wagner by unanimous decision in his first six-round bout.