Five Rounds: Anthony Pettis talks all things UFC

— -- Each week, ESPN.com writer Brett Okamoto provides his take on the hottest topics in the world of mixed martial arts.

This week, Okamoto squares off with former UFC lightweight champion Anthony Pettis to debate all things MMA ahead of his Saturday showdown against Charles Oliveira at UFC Fight Night in Vancouver, British Columbia. Pettis (18-5) is in a three-fight losing streak for the first time in his career but hopes to stop it against Oliviera.

1. UFC president Dana White has said he will not book a trilogy fight between Conor McGregor and Nate Diaz immediately. Is the UFC taking a risk by not doing so?