William Lamar Beane III (born March 29, 1962) is a former American professional baseball player and current front office executive. He is the executive vice president of baseball operations and minority owner of the Oakland Athletics of Major League Baseball (MLB); he is also minority owner of Barnsley FC of the EFL Championship in England and AZ Alkmaar of the Eredivisie in the Netherlands. From 1984 to 1989 he played in MLB as an outfielder for the New York Mets, Minnesota Twins, Detroit Tigers, and Oakland Athletics. He joined the Athletics' front office as a scout in 1990, was named general manager after the 1997 season, and was promoted to executive vice president after the 2015 season.
A first-round pick in the MLB draft by the Mets, Beane failed to meet the expectations of scouts, who projected him as a star. In his front-office career, Beane has applied statistical analysis (known as sabermetrics) to baseball, which has led teams to reconsider how they evaluate players. He is the subject of Michael Lewis's 2003 book on baseball economics, Moneyball, which was made into a 2011 film starring Brad Pitt as Beane.