66 Jordan Simmons G

Simmons (knee) was placed on injured reserve Tuesday, John Boyle of Seahawks.com reports.

The knee injury Simmons sustained during Sunday's game against the 49ers has proven to be more than just a first-degree sprain, ultimately becoming severe enough to land the offensive guard on IR for the remainder of the season. Seattle could be thin at the position if D.J. Fluker is unable to return from a hamstring injury in Week 16 against the Chiefs.

Coach Pete Carroll said Monday that Simmons' knee injury is "going to be an issue", John Boyle of the Seahawks' official site reports.

Simmons -- who injured his knee in Sunday's tilt with the 49ers -- was originally thought to have a first-degree knee sprain. However, Carroll indicated that the injury is more severe, and while the exact diagnosis is still unknown, it's likely Simmons will miss the remainder of the regular season. There's a chance D.J. Fluker (hamstring) returns for Sunday's game against the Chiefs, otherwise Ethan Pocic would likely fill in.

The team believes Simmons has a first-degree knee sprain, Curtis Crabtree of Sports Radio 950 KJR Seattle reports.

A first-degree sprain would indicate the least severe damage to one of the knee ligaments. Nevertheless, Simmons is likely to miss at least a week while recovering. Crabtree surmised in the same Twitter thread that D.J. Fluker (hamstring) at least has a chance to return for Week 16 against the Chiefs, but if both players are unable to go, Ethan Pocic would probably draw the start.

Simmons is questionable to return to Sunday's game against the 49ers with a knee injury, Brady Henderson of ESPN.com reports.

Simmons got the start at right guard in lieu of D.J. Fluker (hamstring), so that leaves the Seahawks precariously thin at the position. Ethan Pocic is now in the game for Simmons.

Simmons (calf) is active for Sunday's game against the Rams, John Boyle of the Seahawks' official site reports.

Simmons cleared up any concern about his calf injury by practicing fully Friday after back-to-back limited sessions to begin the week. He'll be on hand to provide added depth to the Seattle offensive line with D.J. Fluker (calf) sitting out.