Higgins, who will be playing for his fifth team in three seasons, had 11 goals, 23 points and a plus-5 rating in 48 games with Florida this campaign. He was drafted by the Montreal Canadiens in the first round (No. 14) in 2002 and spent five seasons there.
Higgins, who is currently day-to-day with a broken thumb, also played for Calgary and the New York Rangers in 2009-10.
Oberg, who was undrafted by signed by the Canucks as a free agent in April, 2009, had 7 goals and 11 points in 38 games with the Manitoba Moose of the American Hockey League.
I'm just excited about the opportunity. I've been on the ice earlier than usual and in the weight room, pushing around a little more weights than usual. Every day I go into a workout with a smile on my face and ready to go. When you do have a little more responsibility, you want to take your lunch pail and get ready to work.
— Brian Elliott to Jeremy Rutherford of the Post-Dispatch on being the Blues' No. 1 goalie