Neither one has to retire, but both of them should consider it.

That's what I argue in my recent article for Bleacher Report. Shameless self-promotion, I know, but I'd welcome commentary from the BE community, including that inconsolable BR nut-hugger Mike Fagan.

(In case the hyperlink above doesn't work, find it here: http://bleacherreport.com/articles/825138-ufc-134-why-retirement-may-be-a-smart-option-for-nogueira-and-griffin)