List of NHL players: O

O'Brien - Oksiuta

• Dennis O'Brien
• Ellard "Obie" O'Brien
• Shane O'Brien
• Jack O'Callahan
• Mike O'Connell
• Buddy O'Connor
• Myles O'Connor
• Fred O'Donnell
• Sean O'Donnell
• Don O'Donoghue
• Gerry Odrowski
• Billy O'Dwyer
• Gerry O'Flaherty
• John "Peanuts" O'Flaherty
• George O'Grady
• Ben Ondrus
• Paul O'Neil
• Jeff O'Neill
• Jim "Peggy" O'Neill
• Mike O'Neill
• Tom "Windy" O'Neill
• Willie O'Ree
• Tom O'Regan
• Terry O'Reilly
• Danny O'Shea
• Kevin O'Shea
• Chris O'Sullivan
• Adam Oates
• Russell Oatman
• Jaroslav Obsut
• Chris Oddleifson
• Lyle Odelein
• Selmar Odelein
• Jeff Odgers
• Gino Odjick
• Gerry Odrowski
• Brian Ogilvie
• John Ogrodnick
• Mattias Ohlund
• Janne Ojanen
• Todd Okerlund
• Roman Oksiuta

Olausson - Ozolinsh

• Fredrik Olausson
• Ed Olczyk
• Bill Oleschuk
• Danny Olesevich
• Rostislav Olesz
• David Oliver
• Harry Oliver
• Murray Oliver
• Krzysztof Oliwa
• Bert Olmstead
• Grant Olmschenk
• Darryl Olsen
• Dennis Olson
• Christer Olsson
• Jimmie Ölvestad
• Ben Ondrus
• Bill Orban
• Gates Orlando
• Jimmy Orlando
• Dave Orleski
• Brooks Orpik
• Bobby Orr
• Colton Orr
• Vladimir Orszagh
• Jed Ortmeyer
• Keith Osborne
• Mark Osborne
• Randy Osburn
• Chris Osgood
• Mark Osiecki
• Jaroslav Otevrel
• Steve Ott
• Joel Otto
• Maxime Ouellet
• Michel Ouellet
• Eddie Ouellette
• Gerry Ouellette
• Ted Ouimet
• Alexander Ovechkin
• Dennis Owchar
• George Owen
• Sandis Ozolinsh