By Chris Rosvoglou FOX will be quite busy this offseason trying to replace its top broadcast team. On Friday, it was reported that Joe Buck is expected to join Troy Aikman at ESPN. According to Andrew Marchand of the New York Post, Buck’s contract with ESPN is expected to be a five-year deal in the $60-75 million range. FOX tried to keep Buck, but it’s offer might not have been as strong. Assuming that Buck joins Aikman at ESPN, FOX will need to figure out which two commentators will be their top duo. As of now, it sounds like two particular candidates are the favorites in the clubhouse. Kevin…