Jackson leads the Browns in tackles with 138, which is second in the NFL. He'll be in the middle and leading the Browns, who want to prove that Baltimore's domination earlier in the season was an aberration. Birk has played well late in the season when most critics thought he would slow down. He'll have to work into the second level and cut off Jackson's pursuit angles. Birk's strength is his finesse. Edge: Browns Jackson photo by Getty; Birk photo by The Baltimore Sun's Gene Sweeney Jr.