For as much as we in the fantasy football generation focus on the glitzy positions, football still comes down to blocking and tackling. Lose in the trenches, and you'll lose your season. The Minnesota Vikings re-learned that lesson in 2016. On paper, Mike Zimmer's team looked poised to contend for an NFC championship, which was reason trading a first-round pick for Sam Bradford made some sense in September. Then games started. A porous offensive line sprung more leaks with injuries piling up. Soon, Bradford was drowned by pass rushers from every angle. Unable to run block or pass protect, the Vikings offense turned into a maddening display of short dump offs. Speaking on SiriusXM NFL Radio on Tuesday from the Senior Bowl, Vikings general manager Rick Spielman bluntly stated his offseason focus. "Well, I think obviously, we have to address the offensive line," Spielman said. "But I think we have a lot of young pieces in place. We built a very strong nucleus and they are all right now at the prime of their career, we just have to address some of the needs, like every other team does." Spielman tried to solve that problem last season, bringing in tackle Andre Smith and guard Alex Boone. He swung and missed.