TUF 9 lightweight winner Ross Pearson will compete on the UFN 21 card in North Carolina on March 31st. Matt Wiman was originally tapped to face him, but an injury he suffered will force the UFC to find another opponent for Pearson. UPDATE: Fighters Only reports that Pearson will take on German spinning back kick master Dennis Siver. Nate Quarry vs. Jorge Rivera Roy Nelson vs. Stefan Struve Yushin Okami vs. Lucio Linhares Cole Miller vs. Andre Winner Ross Pearson vs. Dennis Siver HT: MMA Junkie UFN 21 coverage