Question:  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?
Sentence (from "Cain Velasquez"): Cain Velasquez (born July 28, 1982) is an American mixed martial artist.
Relevant evidence: Yes