Nilsson, whose rights the Oilers acquired from the Chicago Blackhawks last summer, has posted a 10-12-2 record for Edmonton, while boasting a goals against average of 3.14 and a save percentage of .901.
The departure of Nilsson won't come as much of a shock for Oilers fans, as the 25-year-old netminder had been the subject of trade rumors leading up to next week's deadline, and was made a backup for Friday's loss in Anaheim after originally being announced as the starter.
The Blues, third-place in the Central Division, enter the weekend in a comfortable playoff position at 35-19-9, three points behind the division-leading Dallas Stars.
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