Ricky Wagner, Taylor Decker, Corey Robinson, Cornelius Lucas
There is a stark contrast between the top two. The Lions have one of the better tackle groups in the NFL and it is tough to push them to second best in the division. As mentioned, the team moved on from Riley Reiff. While Reiff was fine, they upgraded in a big way with Ricky Wagner.
Wagner is a former Baltimore Raven and was one of their more reliable players over the past few seasons. However, the team chose to spend on defense rather than offense, and it left the Lions with a chance to upgrade.
They slide Wagner in next to Decker, who is a former first round pick entering his second season. Decker had a nice rookie season, and with a step forward may turn into one of the ten best left tackles in the NFL. That is a valuable commodity to have. Still, that is just the height of Decker and not something that has been seen yet. That, along with the depth of Robinson and Lucas are likely what slip them to two, but they could finish this season with arguably the best tackle group in the league if things play out right.