William Albert Rosen (September 12, 1928, in Chicago, Illinois – April 7, 2019)[1] was an American bridge player, best known for winning the 1954 Bermuda Bowl world championship.
Rosen won the Spingold tournament twice in a row, in 1953 and 1954, the latter helping him qualify for that year's Bermuda Bowl world team championship.
The Bermuda win made him, at 25 years old, the youngest world champion ever to do so; a record broken by Bobby Levin in 1981 at the age of 23.
The September 1954 issue of Playboy Magazine the editors wrote, "If bridge has a world's champion, he's a twenty four year old guy named William Rosen."
In 1958, Rosen won the Lebhar Trophy for winning the Master Mixed Pairs at the North American Championships.