Khan was a dud. It wasn't that he didn't have anything interesting or knowledgeable to say, but I had a hard time watching the fight and understanding him at the same time.
His dialect/phraseology was difficult, for my untrained USA ears to follow, especially when he went into rapid speech mode. A speech coach should be on his list, if he wants to stay behind the mic, in the USA anyway.
Having former or current boxers as color men on a broadcast team is the only way to go.