Malik McDowell seems unlikely to play this season, although the injuries from his ATV accident do not seem to be career-threatening — per several reports.

Pete Carroll said McDowell suffered “multiple injuries,” including a concussion but no cracked skull, and is still only walking, not exerting himself physically. He has returned home to Michigan.

“He had a serious accident. He had multiple injuries; he had the injury to his head,” Carroll said. “It’s going to be quite a while, and we’re going to have to wait it out. He’s on NFI and he’s going to be there for a while, and we’re just going to have to see how he progresses really down the road. We’re not looking for him to get back in the immediate (future), not even for the first game of the season. … We’re going to wait it out and see how he does.”

Asked later on KJR whether McDowell will play this year, Carroll said, “It might be a lot to ask right now.”

Meanwhile, Frank Clark and Germain Ifedi both will return to practice Wednesday, according to reporters who cover the team. Clark was benched for punching Ifedi on Thursday, and the tackle has been out since then as well.

In other news: Eddie Lacy has hit all of his weight markers so far; Jeremy Lane should return Wednesday after missing the past three days with “a slight soft tissue thing”; Jarran Reed has a minor groin pull; Kasen Williams suffered a minor leg injury Sunday; rookie OL Justin Senior, on PUP with a knee injury, appears likely to miss the season.