Why do NFL referees have jersey numbers?

(NEXSTAR) — Jersey numbers can help you identify your favorite NFL player on the field, distinguishing them from their teammates. Those same numbers are also helpful when referees are reporting who caused a flag to be thrown.But what about the numbers NFL referees wear? You can see No. 107 and No. 97 in the photo below from the Black Friday game between the Kansas City Chiefs and Las Vegas Raiders. Kansas City Chiefs special teams coach Dave Toub, left, listens in as referee Clay Mart