Bill Barnwell identifies the Vikings’ “Achilles heel”

Photo by Stephen Maturen/Getty ImagesNo matter how hard a front office works to construct a roster in today’s National Football League, there’s going to be a weakness. Sometimes they’re a little tougher to identify, but other times, much like the big, blinking red light on an old school video game boss, you can figure out what it is pretty easily.

Behind the great E$PN paywall, our friend Bill Barnwell has taken a look at 14 NFL contenders and identified their Achilles heels. For our Minnesota Vikings, he’s chosen the offensive line.

Same as it ever was. . .same as it ever was. . .

Same as it ever was for the Vikings, who have seemingly been attempting to solidify their offensive line for most…