The best overall FA C in my opinion.............no major injury issues...........but will probably cost a pretty penny:
From PFF
Ryan Jensen, C, 74.9 overall grade
The Ravens lost right guard Marshal Yanda to a season-ending injury early in 2017, and the interior offensive line would have been in even worse shape if not for the emergence of center Ryan Jensen. Posting a modest 74.9, the highest grade of his career so far, Jensen had played just 704 snaps in his career heading into the 2017 season but was on the field for 1,052 snaps in 2017. With his grade improving in each of the past three seasons (from 48.9, to 72.2, to 74.9), and his sixth-ranked pass-blocking efficiency rating (98.4), Jensen is the most important of all the Ravens impending free agents. With the added uncertainty of who will start at left guard in 2018, and if Yanda will be back to his best in time for the start of the season, bringing Jensen back would be a smart move at the right price.