Walter Howard "Hod" O'Brien (January 19, 1936 – November 20, 2016) was an American jazz pianist.
Between 1960 and 1963, he played with Phil Woods, Freddie Hubbard, Charlie Rouse, and Lee Konitz.
O'Brien ran the St. James Infirmary jazz club in New York City in 1974–75, and played in the house band alongside Beaver Harris and Cameron Brown; this group accompanied Roswell Rudd, Sheila Jordan, Chet Baker, Zoot Sims, Al Cohn, Pepper Adams, and Archie Shepp, among others.
He played with Marshall Brown (1975), Russell Procope and Sonny Greer (1977), Joe Puma (1977–1982, at Gregory's in New York City), and Stephanie Nakasian (1982).
[1] With Ted Brown With Chet Baker With Art Farmer, Donald Byrd and Idrees Sulieman With Stephanie Nakasian With Joe Puma With Roswell Rudd With Rene Thomas