Here's a link to the story on this MASSIVE Mule Deer.
http://www.muledeercountry.com/?p=1971FYI: The article does state that the buck will not be entered into the books because the guy that harvested it will not strip the velvet from the rack.
Also, apparently it's testicles were about a 1/4 of the size of a normal buck. With that being said, the buck did shed it's antlers every year (There are pictures of it's shed antlers along with the article) and grow a new set every spring. From what I understand, the smaller testicles, and resultant mix-up in testosterone cycles, caused this buck to shed his velvet, shed his antlers, and grow his new set at different times than you would expect this to normally occur.