13 91 117 | CBS stat after Gronkowski's first reception on Janaury 13, 2019 vs the Chargers

CBS put up this stat after Gronk's first reception of the day, January 13, 2019, in the AFC Divisional Round match of the Chargers and Patriots.

It is key it is the 13th.

THIRTEEN = 117
91, the 13th triangular number 

Gates and Gronkowski, G and G, are on the field.