Is Everson Griffen worth the rumored trade attention?

Photo by Adam Bettcher/Getty ImagesAfter the conclusion of the NFL Combine, rumors began to surface that the 49ers had begun preliminarily trade talks with the Vikings for defensive end Everson Griffen. It started as a one-off rumor, but Vikings media has been reporting for some time that the nine-year veteran was a candidate for some contractual gymnastics as the team sought to create additional cap space going into free agency.

Griffen’s contract situation gives the Vikings some flexibility to decide his future. His 2019 salary is guaranteed for injury, and becomes fully guaranteed if he is on the roster on March 15th — the third day of the new league year. If the Vikings release him…