Pat Shurmur's impact on Case Keenum, Vikings has been invaluable

EDEN PRAIRIE, Minn. -- If you dig to the core of the Minnesota Vikings' offensive turnaround, what you'll find is a conventional, practical method cultivated by offensive coordinator Pat Shurmur.

Shurmur took an offense ranked at the bottom of the NFL in 2016 -- 32nd in rushing (75.3 yards per game), 28th in yards per game (315.1), 24th in scoring (20.4 points per game) and 18th in passing (239.8 YPG) -- and manifested immense success for a playoff-bound team eyeing a first-round bye with a win this weekend.

The Vikings enter Week 16 ranked eighth in total offense, ninth in rushing and ninth in passing. In the midst of the best season of his five-year NFL career, Case Keenum has a passer…