UFC featherweight Charles Oliveira takes on former UFC lightweight champion Frankie Edgar on Saturday at UFC 162, and hopes to get back in the top ten rankings with a win. “He’s an ex-champion.  He’s a hard fighter, and I’m here to do my job,” said Oliveira during the UFC 162 open workouts on Wednesday. “I’m coming off a loss and he’s coming off a loss.  He’s the ex-champion.  He fought for the title.  I go to the UFC to fight the best fighters in the world,” he said.  “If I beat him I go back to the top ten of the division.  It’s very important for me to beat him.” Be sure to  Like MMAWeekly.com on Facebook  and  Follow @MMAWeeklycom on Twitter .