I think Joe is favoring the fighters he is close too or that he thinks they should win. At UFC 148 he assumed that Gleison Tibau was going to beat Khabib Nurmagomedov so during the fight he was always telling the viewers that Gleison was superior because he is experienced and a veteran to Khabib even though he was doing NOTHING. Since when being a veteran makes you win a fight?
Then the decision came and Rogan make a fool of himself at the post fight interview by telling the judges that they were wrong with their decisions. He never gave the props to Khabib who won the fight.