A big welterweight division fight has been added to UFC 170 as Damien Maia is set for action against Rory MacDonald. Maia has won three of four as a welterweight in the UFC, most notably defeating Jon Fitch by decision at UFC 156. MacDonald has won five of his last six under the UFC banner, with his last fight being a loss to Robbie Lawler at UFC 167. UFC 170 takes place on February 22nd from the Mandalay Bay Events Center in Las Vegas, Nevada with Daniel Cormier and Rashad Evans headlining.