 Stipe Miocic has tied the record for most successful title defenses held with Randy Couture, Tim Sylvia, Brock Lesnar an an american mixed martial artists who is ranked what in UFC's official heavyweight rankings?
Stipe Miocic:  Miocic has defended the belt twice, and by doing so has tied the record for most successful title defenses held with Randy Couture, Tim Sylvia, Brock Lesnar, and Cain Velasquez. Cain Velasquez:  As of September 28 2017, he is the 3rd ranked heavyweight in the UFC's official rankings.
i don't know