PLAYER
POS
DOB
CLUB
SINCE
NO
Nicolás Otamendi
DF
12.02.1988 (38)
Argentina
Benfica2020
JO
John O'Shea
DF
30.04.1981 (45)
IrelandRetired
—
VO
Viktor Onopko
DF
14.10.1969 (57)
RussiaRetired
—
MO
Morten Olsen
DF
14.08.1949 (77)
DenmarkRetired
—
LO
Lars Olsen
DF
02.02.1961 (65)
DenmarkRetired
—
PO
Percy Olivares
DF
05.06.1968 (58)
PeruRetired
—
BO
Bryan Oviedo
DF
18.02.1990 (36)
Costa Rica Alajuelense2024
KO
Kenneth Omeruo
DF
17.10.1993 (33)
NigeriaFree Agent
—
OO
Oguchi Onyewu
DF
13.05.1982 (44)
United StatesRetired
—
AO
Abdeslam Ouaddou
DF
01.11.1978 (48)
MoroccoRetired
—
DO
David Owino
DF
05.04.1988 (38)
Kenya
ZESCO United2014
JO
Joseph Ochaya
DF
14.12.1993 (33)
Uganda
El Mokawloon El Arab2022
JO
Jorge Olguín
DF
17.05.1952 (74)
ArgentinaRetired
—
FO
Fitina Omborenga
DF
20.05.1996 (30)
Rwanda Rayon Sports2024
O
Oscar
DF
20.06.1954 (72)
BrazilRetired
—
JO
Jayce Olivero
DF
02.07.1998 (28)
Gibraltar St. Joseph's2024
YO
Yoon-Kyung Oh
DF
06.08.1941 (†)
North KoreaDeceased
—
AO
Anton Ondruš
DF
27.03.1950 (76)
SlovakiaRetired
—
DO
David Obua
DF
10.04.1984 (42)
UgandaRetired
—
MO
Martin Olsson
DF
17.05.1988 (38)
Sweden Malmö FF2021
WO
Willi Orbán
DF
03.11.1992 (34)
Hungary
RB Leipzig2015
AO
André Ooijer
DF
11.07.1974 (52)
NetherlandsRetired
—
YO
Yves Oehri
DF
15.03.1987 (39)
LiechtensteinRetired
—
MO
Mohammed Fuad Omar
DF
13.03.1989 (37)
Yemen Al-Sha'ab Ibb2021
JO
Johann Obiang
DF
05.07.1993 (33)
Gabon
Orléans2025
AO
Ambroise Oyongo
DF
22.07.1991 (35)
CameroonRetired
—
MO
Marvin Obando
DF
04.04.1960 (66)
Costa RicaRetired
—
AO
Ali Akbar Ostad-Asali
DF
17.09.1965 (61)
IranRetired
—
EO
Erich Obermayer
DF
23.01.1953 (73)
AustriaRetired
—
MO
Marinos Ouzounidis
DF
10.10.1968 (58)
GreeceRetired
—
EO
Esteban Obiang
DF
07.05.1998 (28)
Equatorial Guinea
Argeș Pitești2023
GO
Godfrey Oboabona
DF
16.08.1990 (36)
NigeriaFree Agent
—
UO
Uche Okechukwu
DF
29.07.1967 (59)
NigeriaRetired
—
PO
Prince Oniangué
DF
11.04.1988 (38)
CongoRetired
—
BO
Beom-Seok Oh
DF
29.07.1984 (42)
South KoreaRetired
—
JO
Jules Onana
DF
12.06.1964 (62)
CameroonRetired
—
AO
Aboud Omar
DF
09.09.1992 (34)
Kenya Kenya Police2023
SO
Sadat Ouro-Akoriko
DF
01.02.1988 (38)
TogoRetired
—
EO
Erick Otieno
DF
27.09.1996 (30)
Kenya
Raków2024
GO
Godwin Odiye
DF
17.04.1956 (70)
NigeriaRetired
—
MO
Mathias Olesen
DF
21.03.2001 (25)
Luxembourg Grazer AK2026 (Loan)
EO
Errol O'Loughlin
DF
18.08.1984 (42)
Saint Kitts and NevisRetired
—
HO
Haidar Obeid
DF
02.04.1979 (47)
IraqRetired
—
DO
David Ochieng
DF
07.10.1992 (34)
Kenya Kenya Police2024
BO
Brian Onyango
DF
24.07.1994 (32)
Kenya
Stellenbosch2024
JO
Joan Oumari
DF
19.08.1988 (38)
LebanonRetired
—
YO
Yordan Osorio
DF
10.05.1994 (32)
Venezuela
Deportes Tolima2026
UO
Uche Okafor
DF
08.08.1967 (†)
NigeriaDeceased
—
JO
Julio Olarticoechea
DF
18.10.1958 (68)
ArgentinaRetired
—
JO
Juhani Ojala
DF
19.06.1989 (37)
Finland Gnistan2024