End Zone - 12 rows from field
My old Canon (non-DSLR) had an 800mm equivalent.
New Nikon using 18-200mm Zoom (insufficient really)
I know Andy (Bullpenphotos) is using at least a 500mm (from the 1st/2nd row of my section).
D.B. - That sounds like a nugget of reality wrapped in a layer of embellished hyperbole.