Fast-rising featherweight Erik Koch suffered an undisclosed injury during training camp that has forced him out of a highly anticipated bout with fellow contender Dustin Poirier, UFC announced Tuesday.
The bout between Koch and Poirier was slated for UFC 143 on Feb. 4 in Las Vegas.
Each is riding a four-fight winning streak that has helped both climb the 145-pound rankings. Koch (13-1) is ranked fourth, while Poirier (11-1) sits at No. 6 in the ESPN.com featherweight power rankings.
With Koch unable to perform, Poirier will take on Ricardo Lamas.
Though Lamas has not yet achieved featherweight contender status, he does sport a professional record of 11-2 and is currently on a two-fight winning streak.
"Lamas is coming off a knockout victory followed by a 'Submission of the Night' win in his last two spectacular outings, while Poirier is a highly touted power-punching prospect looking to make his case for a host at the title," UFC president Dana White said.
In his most recent bout, Lamas applied an arm bar in the second round to submit veteran Cub Swanson. That fight was held Nov. 12 in Anaheim, Calif.
Prior to that bout, Lamas celebrated his featherweight debut June 26 with a first-round TKO of Matt Grice. Lamas previously competed at lightweight.
Franklin McNeil covers mixed martial arts and boxing for ESPN.com. Follow him on Twitter at www.twitter.com/Franklin_McNeil.