The Detroit Lions have lost three of four games, blowing fourth-quarter leads each time.
Detroit slipped and slid in the snow Sunday at Philadelphia, losing three of seven fumbles in a 34-20 defeat against the Eagles.
The Lions can't fall out of first place, even if the Chicago Bears beat the Dallas Cowboys on Monday night, but they've left little room for error over their next three games. Detroit hosts the defending champion Baltimore Ravens next Monday night and plays the New York Giants at home before closing the regular season at Minnesota.
Lions coach Jim Schwartz says the team is focused on the future and winning the division title - for the first time since 1993 - and can't afford to look back.