"Panzer" out, "Immortal" in.

Just days after top German prospect Pascal Krauss announced his withdrawal from UFC 138 due to a shoulder injury, former "Ultimate Fighter" Matt Brown has agreed to step in and take his place against British upstart John Hathaway, according to MMA Fighting.

UFC 138: "Leben vs. Munoz" takes place on Nov. 5, 2011, at  the National Indoor Arena in Birmingham, England.

Brown got a second lease on his Octagon life by outpointing John Howard at UFC on Versus 4 back in June. The unanimous decision win over "Doomsday" snapped a three-fight losing streak, one that included consecutive submission losses.

Can he make it two in a row against the hometown favorite?

The "Hitman" hype train was in full swing when he rocked and socked Diego Sanchez all the way back at UFC 114 in May 2010, which was seen by over one million pay-per-view customers.

He failed to build on that performance, however, dropping a lopsided decision to grizzled veteran Mike Pyle months later in London.

A rebound win over Kris McCray recently restarted his rise up the 170-pound ladder.

UFC 138, recently announced for the promotion's sole trip to the United Kingdom this year, will be headlined by the very first five-round non-title fight with a middleweight match-up pitting division hopefuls Chris Leben and Mark Munoz in what should be a violent war of attrition.

In addition, Thiago Alves will make his return to the cage against Swedish newcomer Papy Abedi in welterweight action.

For the current UFC 138 fight card and line-up click here.