Yet the Lions have only one free agent on the O-line -- backup utility interior lineman Manny Ramirez. And whether or not the Lions keep Ramirez could answer questions about what Detroit does with the rest of its offensive line in the offseason.
The Lions acquired Ramirez in a draft-day trade with the Broncos that also ended up netting them the first-round pick they used to take Laken Tomlinson. Ramirez had a $3 million salary cap number with $1.4 million cash on his deal when he came over from Denver.
Considering the Lions are likely set at guard for 2016 with Tomlinson and Larry Warford, Detroit needs to figure out if Ramirez is the player to push and also teach Swanson at center. Whoever the fourth interior lineman is -- Swanson, Ramirez or another player -- has to have the versatility to play both center and guard, and experience at center since that is likely the position most up for grabs.
The 33-year-old Ramirez could end up being one of the top available centers on the market -- the Jaguars' Stefen Wisniewski will likely be the No. 1 target -- so he may want to see if he can find a starting role somewhere instead of having to compete for one again.
If Ramirez is willing to again serve as a utility lineman who can be plugged in at either guard spot or center, he should be a short-term solution for the Lions.
If Ramirez isn’t willing to do that, the Lions could look at other players, including the Panthers' Fernando Velasco.