Five Rounds: Al Iaquinta talks UFC champions, Nick Diaz, more

— -- 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 UFC lightweight Al Iaquinta to debate the latest news and talk about the UFC belts changing hands, Nick Diaz's return and more. Iaquinta (12-3-1), 29, hasn't fought since a split-decision victory over Jorge Masvidal at UFC Fight Night 63 in April 2015 in Fairfax, Virginia.

1. Seven UFC champions have lost their title in 2016. Why?