Running man: Browns wary of QB Jackson's shiftiness, speed

Baltimore Ravens quarterback Lamar Jackson (8) scores a touchdown in front of Kansas City Chiefs safety Daniel Sorensen (49) during the second half of an NFL football game in Kansas City, Mo., Sunday, Sept. 22, 2019. (AP Photo/Ed Zurga)

Baltimore Ravens quarterback Lamar Jackson (8) throws a pass during the first half of an NFL football game against the Kansas City Chiefs in Kansas City, Mo., Sunday, Sept. 22, 2019. (AP Photo/Charlie Riedel)

Baltimore Ravens quarterback Lamar Jackson (8) is tackled by Kansas City Chiefs defensive end Alex Okafor (97) and defensive tackle Xavier Williams, right, during the first half of an NFL football game in Kansas City, Mo., Sunday, Sept. 22, 2019. (AP Photo/Charlie Riedel)