Richard Alan "Tardo" Hammer (born February 26, 1958, New York City) is an American jazz pianist.
Hammer's mother is an amateur pianist.He worked extensively with Richie Vitale in the 1980s and also played with Warne Marsh, Charlie Rouse, Junior Cook, Bill Hardman, Johnny Griffin, Lionel Hampton, Lou Donaldson, and Art Farmer and Clifford Jordan. A member of Bopera House starting in 1986, he shared leader duties in the group with John Marshall after 1988. He played with Vernel Fournier, George Coleman, Gary Bartz, C. Sharpe, Al Cohn, Harold Ashby, and Annie Ross in the 1990s.