Vikings head coach Kevin O'Connell said Wednesday that Jordan Addison is in concussion protocol and will not be available for the team's second joint practice with the Tennessee Titans on Thursday or Saturday's preseason game.
He suffered "light" symptoms in the aftermath of a catch that took him to the ground during a two-minute drill earlier in the week, according to O'Connell, who added his first-round rookie could return as early as Monday.
Addison was not seen Wednesday during the on-field portion of the first of two Vikings-Titans joint sessions.
This is the second time since joining the team that the 5-11, 175-pound Addison has missed practices due to health issues. He was held out of the Vikings' voluntary organized team activities in the spring due to an undisclosed lower body injury.
"No reason to risk anything, giving him the proper time to work his way through that protocol," O'Connell said.
In Addison's absence, backup receivers Jalen Reagor and Brandon Powell took reps with a first-team offense that again heavily featured Justin Jefferson and K.J. Osborn.
Osborn, a 2020 fifth-round pick who has started 18 games over the last two seasons, knows firsthand the importance of seizing the kind of opportunity that now awaits Reagor, Powell and Trishton Jackson, who recently returned from a knee injury.
"It's huge," Osborn said. "When guys go down, you got to step up. When Trishton [Jackson] went down, other guys stepped up. Now Jackson came back and you see him making plays."