Without the benefit of a first-round draft pick (which is a top-15 pick, by the way, thanks to the team's 8-8 finish) because of the trade for Sam Bradford, how will the Vikings upgrade their offensive line?

To me, this is the biggest question facing the Vikings as they head into the offseason. It's not a glamorous question because offensive line is not a glamorous position.

But it is still a bigger question than what will happen at quarterback (where Bradford is still under contract, regardless of Teddy Bridgewater's health) or what will become of Adrian Peterson (one has to imagine he's played his final down in purple).

The performance of the offensive line is a multiple-year, multiple-position problem.

Without a significant investment in the offensive line — which will take creativity and determination — the offensive problems of 2016 will resurface again in 2017.

Read Michael Rand's blog at startribune.com/randball. michael.rand@startribune.com.