Minnesota Vikings linebacker E.J. Henderson sat out Thursday’s practice with a swollen knee, and could miss Sunday's game against Tampa Bay. Head coach Leslie Frazier tells Fox Sports North he isn't sure who will start if Henderson is held out of the lineup.

Yesterday the Vikings placed four starters on injured reserve. Apparently they haven't struck the bottom yet because middle linebacker E.J. Henderson missed practice today because of a shoulder injury.

Vikings head coach Leslie Frazier says he'll decide Sunday if he'll start linebacker E.J. Henderson, who has missed the last two practices with a sore knee. Henderson tells the Star Tribune he's "pretty confident" he'll be ready to play, but Frazier says he wants to be cautious with the injury.

Vikings' linebacker E.J. Henderson is now listed as questionable for Sunday's game in Kansas City. Henderson has a sore left knee which kept him out of practice earlier this week. Coach Leslie Frazier expects Henderson will play, but exactly how many snaps he'll see is uncertain.

Minnesota Vikings linebacker Erin Henderson missed his second straight practice because of a concussion on Thursday. If Henderson can't play Sunday, backup Marvin Mitchell will take his place.

Vikings linebacker Erin Henderson is officially out for Sunday's game against the 49ers. Henderson missed three consecutive practices this week after suffering from a concussion last Sunday. Marvin Mitchell will start in place of Henderson.

Injuries kept Vikings' cornerback Antoine Winfield, center John Sullivan, and punter Chris Kluwe out of practice Wednesday. Their status for Sunday's game against Arizona is unknown. Safeties Husain Abdullah and Jamarca Sanford along with linebacker E.J. Henderson and tackle Charlie Johnson were all limited in practice.

A concussion kept Vikings linebacker Erin Henderson out of practice on Wednesday. He was the only non-participant for an otherwise healthy team. Henderson was checked for an injury Sunday against the Colts but he returned to the game.