Weekend results: Gegard Mousasi, Matt Mitrione, Ross Pearson pick up winsMaggie HendricksCagewriter8 April 2013Perhaps the last-minute opponent change was exactly what Gegard Mousasi needed. The former Strikeforce light heavyweight champion made his debut on Saturday and pulled out a decision over Ilir Latifi, a late replacement after Alexander Gustafsson was not cleared for the fight because of a cut. Mousasi pulled out the unanimous decision win, but shared afterwards that he was dealing with a knee injury."I don't want to talk a lot about my injury, but I can tell that this injury, I'm pretty sure 95 percent wouldn't fight, from other fighters," Mousasi said in the postfight press conference."You know, I stepped up, I didn't cancel the show, you know, I don't know, we go from here, you know."In other action, Ross Pearson notched a second-round TKO over Ryan Couture. Matt Mitrione stopped his losing streak with a 19-second KO of Philip de Fries. Brad Pickett won a split decision over Mike Easton in a bout that won Fight of the Night honors. Diego Brandao submitted Pablo Garza in the third round with an arm-triangle choke.