Dennis Siver Out Against Cub Swanson, Dustin Poirier in at ‘UFC on FUEL TV 7′

After watching countless fighters exit UFC events last year for various wounds, the injury bug is already doing its thing not even a month into 2013. On Thursday morning, it was announced an undisclosed injury has forced Dennis Siver out of his featherweight shootout with Cub Swanson. Up-and-comer Dustin Poirier (Pictured) has agreed to serve as a last-minute substitute on February 16th. Poirier was on the cusp of sniffing a championship affair until getting submitted by “The Korean Zombie” Chan Sung Jung in May. “The Diamond” rebounded nicely by tapping out Jonathan Brookins just last month. Swanson will be riding a three-bout winning streak into the pivotal scrap. He was most recently seen putting Charles Oliveira to sleep at UFC 152. Swanson vs. Siver was slated to co-headline the gig. It is believed the new matchup will maintain second-to-top billing. ‘UFC on FUEL TV 7‘ takes place inside Wembley Arena in London, England. Here is the show’s updated lineup: Preliminary Card: (Facebook 12PM ET/9AM PT) Phil Harris vs. Ulysses Gomez Vaughan Lee vs. Motonobu Tezuka Tom Watson vs. Stanislav Nedkov Andy Ogle vs. Josh Grispi Paul Sass vs. Danny Castillo Terry Etim vs. Renee Forte Main Card: (FUEL TV 3PM ET/12PM PT) Che Mills vs. Matt Riddle James Te Huna vs. Ryan Jimmo Gunnar Nelson vs. Justin Edwards Jimi Manuwa vs. Cyrille Diabate Cub Swanson vs. Dustin Poirier Michael McDonald vs. Renan Barao (UFC interim bantamweight champion)