Simplify the following text for a Grade 11 native English-speaking person.
Original: Matthew Stajan ( born December 19 , 1983 ) is a Canadian professional ice hockey center currently playing for the Calgary Flames of the National Hockey League ( NHL ) .
Simplified: Matthew Stajan ( born December 19 , 1983 ) is a Canadian professional hockeyplayer who plays for the Toronto Maple Leafs .