Coming out of The Ultimate Fighter Season Seven, Amir Sadollah had some serious momentum. The scrappy, affable welterweight from Richmond, Va., earned his name with gritty finishes over more highly regarded fighters. He accepted the victories with humor and humility—two traits that helped him land a plum TV gig.

But with the beast having the nature that it does, momentum never lasts long. Serious leg injuries twice sidelined Sadollah, and when he finally came back, he went 2-1 in three respectable fights before getting his you-know-what handed to him by Dong Hyun Kim at UFC 114.

Now, written off by many fans, Sadollah again finds himself with something to prove—a role in which he has excelled before.

This Saturday at UFC 122, he faces young Peter Sobotta, who is 0-2 in the Octagon and facing a must-win situation after competing hard but losing to Paul Taylor, and then James Wilks.

It's a classic desperation fight—both guys really, really need a victory. Sadollah is the one to do it. Here's why.

Sobotta is a native of Poland and Germany, and thus should have plenty of crowd support at UFC 122, which is being held in Oberhausen, Germany. German fans know Sobotta well—his inclusion on this card certainly has more than a little to do with that mutual familiarity.

If Sobotta can stand with Sadollah or work his jiu-jitsu early, that could get the crowd into a real lather—great news for a young man who has admitted to feeling rattled under the bright lights.

That's why Sadollah has to grind this one out. We know he has a good chin and decent hands, but he need not answer the siren song that is pure standup.

He should work from the clinch and soften up Sobotta with his superior muay thai. Then, as he did in his reality show upsets over Matt Brown and C.B. Dollaway, Sadollah can, and will, sink in the choke for the submission.