Baltimore Ravens quarterback Lamar Jackson is yet to resume practice and head coach John Harbaugh will not be drawn on his postseason availability.

The 2019 NFL MVP has not played since sustaining a knee injury against the Denver Broncos on December 4, with Tyler Huntley starting in his absence.

Jackson missed a 13th straight practice on Wednesday raising concerns about his playoff availability for the Ravens, who are 10-6 and guaranteed of an AFC Wild Card ahead of their regular-season finale against the Cincinnati Bengals on Sunday.

"I'm just probably going to leave all that stuff alone," Harbaugh told reporters.

"I'm going to focus on the game and just get ready to coach our guys and have our guys get ready to play the game."

The Ravens offense has averaged 12.3 points and scored only three touchdowns in the past four games since Jackson's injury, yet have won two of those games on the back of their defense.

Baltimore have been held to 17 or fewer points in five straight games, the first when Jackson was injured.

"They're not challenges that we're going to sit here and say we can't overcome or we can't win games with," Harbaugh said about his offense.

"We've got to try to do everything we can to make those plays in the next game. That's all you can do in this league."

Huntley is also dealing with soreness in his right throwing shoulder ahead of the Cincinnati game, which could determine who wins the AFC North, pending the decision made on the suspended Bengals-Buffalo Bills game.

The Bengals would have clinched the AFC North with victory against the Bills on Monday, but the game was suspended after Damar Hamlin suffered a cardiac arrest. If the game is resumed and the Bengals lose, the Ravens could still claim the AFC North with victory on Sunday.