Mike Pereira joined Fox Sports in 2010, shortly after retiring from the NFL, and immediately established the value of the then-new role of television rules analyst.
But it would have been difficult at the time to envision how essential the job would become by 2019.
"The way the NFL rules are these days, I almost can't even imagine you could operate your No. 1 show without having someone up there immediately available," said Jim Nantz, CBS' lead play-by-play man.