Shawn Smith, who will referee the Super Bowl, works from Monday to Friday works as a manager at the Detroit branch of a medical insurance firm

Shawn Smith, who will referee the Super Bowl, works from Monday to Friday works as a manager at the Detroit branch of a medical insurance firm

What do a tax fraud investigator, a physical therapist and a health insurance salesman have in common? They are all refereeing this weekend's Super Bowl.

It is a little-known quirk of the NFL that the multi-billion-dollar-grossing sports behemoth employs part-time officials to oversee even its biggest games.

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.