William Jensen is an American Magic: The Gathering player. Best known for winning Pro Tour Boston 2003, he has earned three other Pro Tour top eight finishes, and fifteen Grand Prix top eights, including three wins. Jensen is one of the few players to have beaten Kai Budde in the elimination rounds of a Pro Tour. In 2013 he was voted into the Hall of Fame. He is the current record holder of most Grand Prix top eight finishes within a single season, with eight in 2013-14.