1. Jonah Jackson, Frank Ragnow, Halapoulivaati Vaitai, Evan Brown, Logan Stenberg
Of all of the Interior linemen, Frank Ragnow may be the best in the entire division. Ragnow missed most of last season with an injury, and it obviously impacted the Lions in a big way. A lot of analysts are giving the Lions credit this offseason and thinking that they can improve with Ragnow back into the mix.
Vaitai and Jackson are quality depth. Jackson is entering year three and has been a reliable starter since being draft from Ohio State. Vaitai was signed to play right tackle but has settled in well at right guard.
Stenberg is another draft pick entering his third season, and for now, he is just fine depth. Beyond that, Evan Brown solidifies the group. The team has starters at all three spots, and Ragnow may be a top-end starter when healthy. With all of it in mind, they are the top team in the division on the interior OL.