John Urschel is the NFL's busiest player-mathematician, and not only because he is the NFL's only player-mathematician.
When not preparing for his second season on the Baltimore Ravens' offensive line, Urschel (who has a Master's degree in mathematics) can be found writing mathematical papers for scholarly journals, serving on the editorial board for the Journal of Sports Analytics, blogging for The Player's Tribune, and making the occasional appearance at Manhattan's Museum of Math ("MoMath" to the geek chic) as pitchman for Persado, a company that uses analytic methods to maximize the persuasion power of words and phrases used in marketing campaigns.