Erik Koch vs. Ricardo Lamas booked for UFC 155 on Dec. 29 in Las Vegas

Looks like Frankie Edgar is still next in line to fight Jose Aldo.

That's because Ultimate Fighting Championship (UFC) has gone and paired the former number one contender, Erik Koch, against another streaking up-and-comer, Ricardo Lamas. The pair will do battle at the promotion's upcoming UFC 155 pay-per-view (PPV) event scheduled for the MGM Grand Garden Arena on Dec. 29, 2012.

The winner is widely expected to be next in line for a crack at the 145-pound crown.

Koch (13-1) was already scheduled to fight Aldo at the UFC 149 event earlier this year; however, "New Breed" was felled by injury and forced to bow out of the Canadian contest. The Iowan is the winner of four straight and has already disposed of Raphael Assuncao and Jonathan Brookins since transitioning to the Octagon in early 2011.

But he's got his work cut out for him.

Lamas (12-2) rebounded from a knockout loss to Yuri Alcantara by running through his next two opponents. He beat the brakes off Matt Grice in his UFC debut and followed that up by strangling Cub Swanson just a few months later. "The Bully" was last seen pushing around Hatsu Hioki at UFC on FX 4 earlier this year in New Jersey.

Who moves to the head of the class in "Sin City?"

UFC 155 will feature a monster heavyweight rematch pitting current titleholder Junior dos Santos, against the man he took the 265-pound strap from last year, Cain Velasquez. Also scheduled for the year-end fight card is a light heavyweight tilt between Forrest Griffin and Phil Davis.

See the complete fight card and line-up by clicking here.