Detroit won for the fourth time in five games and completed a six-game road trip with a 4-2 mark. Petr Mrazek made 25 saves and improved to 3-0 in four career appearances against St. Louis.
Joakim Andersson and Tomas Tatar scored in a 60-second span in the second period to give the Red Wings a 2-0 lead. Datsyuk's 14th goal of the season helped Detroit improve to 5-9 in overtime.
David Backes and Alexander Steen had goals for St. Louis, which had a five-game winning streak snapped. Steen scored with 47 seconds left in regulation to tie it 2-2.
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