JACKSONVILLE, FLORIDA – APRIL 22: (L-R) UFC Welterweight Champion Kamaru Usman of Nigeria and Jorge … [+] Masvidal face off…

JACKSONVILLE, FLORIDA – APRIL 22: (L-R) UFC Women’s Strawweight Champion Zhang Weili of China and … [+] Rose Namajunas face…

ABU DHABI, UNITED ARAB EMIRATES – JANUARY 23: In this handout image provided by the UFC, (L-R) Conor … [+]…

LAS VEGAS, NEVADA – MARCH 25: Stipe Miocic interacts with media during the UFC 260 press conference … [+] at…

LAS VEGAS, NEVADA – MARCH 26: (L-R) Opponents Stipe Miocic and Francis Ngannou of Cameroon face off … [+] during…

However, arguably the greatest mixed martial artist of all time is officially retired after Ultimate Fighting Championship president Dana White…

Elias Theodorou (left, pictured during a UFC bout with Derek Brunson) is the first professional … [+] athlete and MMA…

LAS VEGAS, NEVADA – MARCH 06: Amanda Nunes of Brazil reacts after her victory over Megan Anderson of … [+]…

LAS VEGAS, NEVADA – MARCH 04: Israel Adesanya of Nigeria interacts with media during the UFC 259 … [+] press…

LAS VEGAS, NEVADA – MARCH 05: (L-R) Opponents Petr Yan of Russia and Aljamain Sterling face off … [+] during…