3. Charles in charge: Jamaal Charles, K.C's electric, lightning-quick tailback, finished second in the league with 1,467 yards on the ground. His gaudy 6.4 yards-per-carry average fell just short of Jim Brown's NFL record. Charles had 10 runs of 20 yards or longer, and his 80-yard run in Week 15 was the NFL's longest run of 2010. "He can go to the house from anywhere on the field," safety Ed Reed said. "We've got our work cut out for us." Especially with bruising back Thomas Jones (six TDs) waiting on the bench to spell Charles when he needs a breather.