The question is whether they will find any takers, given his contract. Sullivan is signed through 2017 and scheduled to have salary-cap numbers of $5.833 million each of the next two seasons after renegotiating his contract in April 2015. That was only four months before he started experiencing back problems at training camp that led to two back surgeries last year.
Sullivan would cost another team $5.5 million per season, with the Vikings eating $333,333 each of the next two years in prorated signing bonus.
Joe Berger replaced Sullivan last year when the long-time starter missed the entire season because of those surgeries and performed well. Berger, however, is only scheduled to count $1.435 million against the salary cap, which could be a big reason the Vikings are investigating the possibilities of trading Sullivan.
However, it would also significantly thin the experienced depth on the interior of the offensive line. Zac Kerin is a holdover from last year and has received work at both center and guard, and Nick Easton, acquired in the trade with Gerald Hodges last year, has been getting work at center in preseason games, too.
Berger played guard the first two games of the preseason with Brandon Fusco out, but played center in the third preseason game while Sullivan didn’t play at all.