Lions check a massive free agency box with re-signing of Graham Glasgow

The window to start negotiating (wink, wink) with other team's free agents doesn't start until a little later Monday. But teams can re-sign their own free agents whenever, and to that end the Detroit Lions have reportedly agreed to terms with offensive lineman Graham Glasgow.

According to ESPN's Adam Schefter and others, it's a three-year, $20 million with $9.5 million guaranteed.

Glagow was drafted by the Lions in 2016 and came back last offseason after being cut by the Denver Broncos. He was fantastic last season once he stepped in as the starter at right guard, grading out as a top-10 guard by Pro Football Focus (74.9 overall grade). He started 13 games at right guard, one at center in place of an injured Frank Ragnow and one at left guard when Jonah Jackson was out. He was also second best in ESPN's run block win rate among all interior offensive lineman (77 percent).

Aside from his top-notch play last season, Glasgow's versatility carries great value.

Graham Glasgow gets well-deserved raise from Lions

When the Lions were cleaning out their lockers after the loss to the 49ers in the NFC Championship Game, Glasgow spoke openly about wanting to be be back but also about what he felt he had earned with his performance all season (via Justin Rogers of the Detroit News).

" I would love to be back," Glasgow said. "I think I had a really good year, probably top one or two of my career. I would like to make more money than I did this year and I would assume the guys upstairs know and understand that. I feel like stuff like this kind of works. Hopefully, we'll be able to work through it."

Retaining Glasgow became even more important as momentum builds toward Jackson leaving in free agency. Glasgow got the raise, and multi-year deal, he was looking for. He has confirmed the news.

Glasgow joins kicker Michael Badgley, linebacker Jalen Reeves-Maybin and cornerback Emmanuel Moseley as players the Lions have re-signed before free agency opens fully.