The following are riders who have taken part in Grand Prix motorcycle racing and whose surnames begin with "O". NameSeasonsWorld ChampionshipsMotoGP Wins500cc Wins350cc WinsMoto2 Wins250cc WinsMoto3 Wins125cc Wins80cc Wins50cc WinsMotoE Wins Casey O'Gorman2025-00000000000 Eddie O'Shea2024-00000000000 Tomasso Occhi202500000000000 Steven Odendaal2011-2013, 2015-201900000000000 Scott Ogden2022-00000000000 Ai Ogura2018-1 Moto2 - 20241006000000 Jason O'Halloran201300000000000 Jun Ohnishi201100000000000 Seijin Oikawa2006-200700000000000 Tadayuki Okada1989-2000, 200800400200000 Shizuka Okazaki2016, 201800000000000 Hikari Okubo2010-2011, 2014, 2021-202300000000000 Joan Olivé2001-201200000000000 Miguel Oliveira2011-202505006060000 Can Öncü2018-201900000010000 Deniz Öncü2019-00002030000 Ornella Ongaro200900000000000 Hiroki Ono2008, 2011, 2013-201600000000000 Yuki Oogane200900000000000 Jean-Philippe Orban1977-197800000000000 Iván Ortolá2022-00002040000 Kazuya Otani200600000000000 Peter Öttl1986-199700000002300 Philipp Öttl2012-201900000010000