Athletes
Last Name begins with
- Alex Obbard
- Mike Oblad
- Matt O'brien
- Al Ochoa
- Kenny Oconnell
- John O'connell
- Art O'connor
- Justion O'connor
- John Odd
- Eric Odell
- Doug Odgen
- Jacob Odgen
- Liam O'donnell
- Sinead O'dwyer
- Kurt Ogden
- Shannon O'grady
- Matt Ohran
- Jonn Okamoto
- Kevin O'keefe
- Ryan O'keefe
- Troy Oldroyd
- Conner Oleary
- Clayton O'leary
- Conor O'leary
- Dustin Olenslager
- Michael Olheiser
- Jeff Olin
- Flavia Oliveira
- Brian Oliver
- Kellie Oliver
- Kelly Oliver
- Benjamin Olmstead
- Doug Olmstead
- Aaron Olsen
- Bryce Olsen
- Brye Olsen
- Chantel Olsen
- Drew Olsen
- Eric Olsen
- Jerald Olsen
- Michael Olsen
- Steve Olsen
- Todd Olsen
- Trent Olsen
- Brent Olson
- Brock Olson
- Erik Olson
- Jenene Olson
- Kevin Olson
- Mike Olson
- Stephanie Olson
- Bryce Omer
- Daniel Omer
- Patrick Omer
- Trey O'neal
- Gregory Oneil
- Valeria O'neill
- Adam Opalek
- Scott Openshaw
- James Orford
- Druid Orion
- Gareth Orr
- Karen Ortiz
- Chris Orton
- Jessica Orvis
- Andrew Osgood
- John Osguthorpe
- Grey Osment
- Tory Osment
- Colton Osterhout
- Cy Ott
- Mark Otterson
- Ryan Ottley
- Doug Ovard
- Thomas Overdeck
- Charles Owen
- Nathan Owens
- Eijai Oxford