Are the days of a running NFL over?SI.com's Andrew Perloff, The MMQB's Jenny Vrentas and former Pro-Bowl FB Tony Richardson discuss the lack of a quality running game in the modern NFL.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceSI.com's Andrew Perloff, The MMQB's Jenny Vrentas and former Pro-Bowl FB Tony Richardson discuss the lack of a quality running game in the modern NFL.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Sep 30, 2013 | Modified Sep 30, 2013SI STAFFShare on FacebookShare on XHome/NFL