Question: What is the name of the character in the television series "Rob & Big" who was the best friend of Rob Dyrdek and who was born on January 13, 1972?
Sentence (from "Rob &amp; Big"): Rob & Big is an American reality television series that follows the lives of professional skateboarder, actor, producer Rob Dyrdek and his best friend and bodyguard Christopher "Big Black" Boykin.
Relevant evidence: Yes