QB Lamar Jackson among several Ravens missing from practice

Baltimore Ravens quarterback Lamar Jackson was not spotted in the portion of practice open to the media on Wednesday.

That's perhaps to be expected in the wake of a Baltimore Sun report that said the two-time NFL MVP will not play in Week 5 and could face a longer absence because of a hamstring injury.

Jackson sustained his injury in the fourth quarter of Baltimore's 37-20 loss to the Kansas City Chiefs last Sunday. He was replaced in that game by Cooper Rush, who would be in line to start this Sunday as the Ravens (1-3) host the Houston Texans (1-3).

Baltimore coach John Harbaugh doesn't know if Jackson's injury occurred on a particular play.

"I really don't have any information about that, and I really don't think it matters," Harbaugh said. "It's not what I'm thinking about. I'm thinking about the team and getting ready to practice.

"And Lamar's working. He's doing a great job. I talked to him yesterday for a long time. He's been in here all day working and in the meetings."

Jackson wasn't the only one missing from Wednesday's practice. Middle linebacker Roquan Smith (hamstring), cornerbacks Marlon Humphrey (calf), Nate Wiggins (elbow) and Chidobe Awuzie (undisclosed), left tackle Ronnie Stanley (ankle) and fullback Patrick Ricard (calf) also were not spotted.

NFL Network reported Smith and Humphrey might each miss 2-to-3 weeks.