Logan Couture and Joel Ward scored in the first period and the San Jose Sharks gave the Chicago Blackhawks their second straight loss with a 2-1 victory on Wednesday night.
Artemi Panarin scored for the Blackhawks, who suffered back-to-back losses for the first time since opening the season 0-2.
Martin Jones, who had his 15th career shutout Monday night, stopped 33 shots for his 10th win of the year.
Corey Crawford saved 33 shots for the Blackhawks, who entered the contest with points in 10 of their last 12 games against San Jose.
Chicago captain Jonathan Toews left with an unspecified injury following the second period. He leads the league with 292 faceoff wins and had a game-high eight after two periods.