The Minnesota Vikings will have the 11th pick in the 2015 NFL draft, and as they try to build on a 7-9 record in 2014, they might start by adding another piece to coach Mike Zimmer's defense.

The Vikings finished 14th in the league in yards allowed, and 11th in points allowed, after ranking at the bottom of the league in both categories last season. They saw impressive returns on a defensive overhaul last offseason, and if they can add a few pieces to the group they put together this season, the Vikings could have one of the better defenses in the league in 2015.

Another linebacker, as well as an upgrade at safety, could be good places to start. ESPN's Todd McShay has Alabama's Landon Collins 11th on his latest draft board, and the athletic safety might be a nice fit next to Harrison Smith. Players like Georgia linebacker Leonard Floyd could also intrigue the Vikings.

And then there are the questions the Vikings have to address on offense. If Adrian Peterson isn't coming back, would Wisconsin running back Melvin Gordon make sense? Could Louisville wide receiver DeVante Parker -- a former college teammate of Teddy Bridgewater's -- be an option if the Vikings don't think Cordarrelle Patterson will be their No. 1 wideout? The Vikings have a number of places they could look for upgrades, and they are sure to consider all of them over the next four months.