Lamar Jackson says in tweet he's suffered grade 2 PCL sprain

FILE - Baltimore Ravens quarterback Lamar Jackson (8) watches from the sideline during the first half of an NFL football game against the Jacksonville Jaguars, Sunday, Nov. 27, 2022, in Jacksonville, Fla. Lamar Jackson was again absent from practice during the portion open to reporters Wednesday, Jan. 11, 2023. The Baltimore star hasn't practiced since injuring his knee in a Dec. 4 win over Denver, and there was no sign of him Wednesday as the Ravens prepared for Sunday night's playoff opener at Cincinnati. Jackson missed the final five games of the regular season. (AP Photo/Phelan M. Ebenhack, File)

FILE - Baltimore Ravens quarterback Lamar Jackson (8) looks to pass the ball during the first half of an NFL football game against the Denver Broncos, Sunday, Dec. 4, 2022, in Baltimore. Lamar Jackson was again absent from practice during the portion open to reporters Wednesday, Jan. 11, 2023. The Baltimore star hasn't practiced since injuring his knee in a Dec. 4 win over Denver, and there was no sign of him Wednesday as the Ravens prepared for Sunday night's playoff opener at Cincinnati. Jackson missed the final five games of the regular season.(AP Photo/Terrance Williams, File)