Marek Leszek Deska (born August 24, 1985) is a Polish-Canadian professional baseball player who began his baseball career in Toronto, Ontario, Canada and as of 2007, is playing in the Dutch Major League (Honkbal Hoofdklasse) for Mediamonks RCH. Upon his first start, which was against Instant Holland Almere '90 on May 20, 2007, Deska became the first player in history to play in the highest Dutch league with a Polish passport. Deska is a right-handed pitcher and started his professional baseball career with the Toronto Maple Leafs of the Intercounty Major Baseball League.