"The issue: Tennessee Titans running back Chris Johnson.

The question: Can the Buffalo Bills stop him?

"Easier said than done," said Bills coach Dick Jauron, whose team visits the Titans on Sunday. "We're working hard on trying to figure out what we can do to try to slow him down because it doesn't seem like that many people have success doing that."

Johnson is the NFL's leading rusher with 959 yards, 122 more than Cedric Benson of Cincinnati. The second-year pro is just 269 yards shy of last season's rookie total and is on pace to challenge the single-season franchise record of 1,934 yards set by Hall of Famer Earl Campbell in 1980. Johnson also has a shot to become the sixth running back in NFL history and the first since Jamal Lewis in 2003 to reach 2,000 yards.

Johnson, the 24th overall pick in last year's draft, ran the 40-yard dash in a staggering 4.24 seconds at the league's scouting combine last year. By comparison, Bills receiver Lee Evans ran the 40 in 4.38 seconds.

Johnson puts that blazing speed to good use. He has seven plays of more than 40 yards this season, including touchdown runs of 91, 89, 57 and 52 yards. He has five other runs of at least 20 yards. He also turned a short pass reception into a 69-yard touchdown.

Because of those big runs Johnson is averaging a whopping 6.7 yards per carry, the highest average for an NFL leader through nine weeks since 1970, according to the league. The last player to win a rushing title while averaging more than 6 yards per carry was Barry Sanders, who had a 6.1 average during his 2,053-yard season in 1997."