Football referees

Jamie O'Connor

Javier Obreque

John Ocampo

Joseph Odey Ogabor

Jorge Ojeda

J. Oldham

J. Ordelmans

Jefry Daniel Orejuela Hernández

Joseph Orellan

Jorge Carlos Ortiz León

José Alexander Ortiz Novoa

Jonathan Jair Ortíz Tonguino

Jorge Oses

Jorge Luis Osorio Reyes

Jhon Alexander Ospina Londoño

Joakim Östling

Jean Ouattara

Jose Nguema Owono Owono Asangono

Juan Jose Pacheco Guijarro

Jack Packman

Jamie Padilla

Juan Pafundi

Jan Justin Paju

Jorge Panta

José Panta

José Alberto Pardeiro Puente

Jong-Myeong Park

Jin-Ho Park

Jung-Ho Park

Josiah Parke

Jurijus Paškovskis

Jan Paták

Jordan Paterson

Jackson Pavaza

Jozef Pavlik

Jelena Pejkovic

Juan Manuel Peña

José Alfredo Peñaloza Soto

John Edison Perdomo Horta

Jorge Antonio Pérez Durán

Julian Perl

Jürgen Petersoo

Jim Petersson

Jan Petřík

Johann Pfeifer

Julio Cesar Pfleger

Joachim Caffe Pierson

Jérémie Pignard

Jonathan Benkenstein Pinheiro

John Francis Pitti