Vikings head coach Kevin O'Connell said Wednesday that Addison is in the concussion protocol, Ben Goessling of the Minneapolis Star Tribune reports.
Addison is experiencing some minor concussion symptoms following a fall during a two-minute drill earlier this week and will be sidelined until at least Monday. As a result, he looks set to miss Saturday's preseason contest against the Titans, giving him just one more chance to see game action before the Vikings' Sept. 10 season opener versus the Buccaneers. In the meantime, K.J. Osborn and Jalen Reagor should get extra first-team reps during Addison's absence.