jason raymond bay (born september 20, 1978) is a canadian-american former professional baseball left fielder. bay played in major league baseball (mlb) for the san diego padres, pittsburgh pirates, boston red sox, new york mets and seattle mariners. bay was the national league rookie of the year in 2004 and he won the silver slugger award in 2009. he is a three-time mlb all-star and a three-time tip o'neill award winner as the best canadian baseball player.