This has been often asked, and long-time NBC exec provided a little insight in this article. Seemed to be too technical for a telecast, and he has the same criticism about Jon Gruden.
http://awfulannouncing.com/2015/for...kes-on-jon-gruden-mike-mayock-and-others.html
http://awfulannouncing.com/2015/for...kes-on-jon-gruden-mike-mayock-and-others.html