Pittsburgh Steelers quarterback Ben Roethlisberger smiles during a timeout late in the fourth quarter of a 21-9... PITTSBURGH (AP) -- The field was soft and muddy and the snow was falling heavily on one of those nasty-weather days most NFL offensive players despise. To Jerome Bettis, the conditions were next to perfect. Bettis, the NFL's No. 5 career rusher but a forgotten man much of the season, plowed through the muck and snow for two touchdowns and 101 yards and the Pittsburgh Steelers beat Chicago 21-9 on Sunday to end the Bears' eight-game winning streak. A season-long lack of...