ESPN UK first brought word of the pending match-up, which is under consideration for the United Center on Jan. 28, 2012, in Chicago, Illinois.
Dunham (12-2) rocketed to the top of the lightweight buzz list with wins over Efrain Escudero and Tyson Griffin; however, a close split decision loss to Sean Sherk, followed by a first-round ass-whooping at the hands of Melvin Guillard, sent the talented Oregon native to the back of the line.
Can he survive the dreaded "Sassangle" in the "Windy City?"
Sass is undefeated at 12-0 and has finished 11 of his victims by way of submission. If you're keeping score at home, the count is eight triangle chokes and three heel hooks -- including one over Michael Johnson at UFC on Versus 6 back in October.
Stay tuned to MMAmania.com for more updates to the UFC on FOX 2 card as they become available.