this would probably be a long shot, you would have to see how nick looked at 185, hes never fought there before. I did hear that he was gonna fight in strikeforce at middleweight or something, but i think it was just a rumor or still in the works.
"Diaz's manager Cesar Gracie said he expects the Stockton, Calif., fighter to compete between 160 and 170 pounds four times in the next five months. He also said there's a possibility that Diaz will move up to middleweight for a fight in Strikeforce, which would make three signed contracts for three promotions at three different weights."
Mapping the Dream standings - Josh Gross - SI.com