Question: Who is a former American baseball player who was in the movie Moneyball?

Context paragraphs:
Bill Zepp: William Clinton Zepp (born July 22, 1946), is a former American baseball player.  A right-handed pitcher, he attended the University of Michigan and later played professional baseball for four years from 1968 to 1971, including stints in Major League Baseball with the Minnesota Twins (1969–1970) and Detroit Tigers (1971).  He compiled a 10-5 win–loss record (.667 winning percentage) and a 3.64 earned run average (ERA) in 63 major league games.

Gary Sutherland: Gary Lynn "Sudsy" Sutherland (born September 27, 1944) is a former American baseball player.  He played college baseball at the University of Southern California and later played 13 seasons in Major League Baseball, principally as a second baseman (717 games) and shortstop (164 games), from 1966 to 1978.

Joe Coleman (baseball, born 1947): Joseph Howard Coleman (born February 3, 1947) is a former American baseball player.  He played professional baseball as a pitcher from 1965 to 1982, including 15 seasons in Major League Baseball with the Washington Senators (1965–70), Detroit Tigers (1971–76), Chicago Cubs (1976), Oakland Athletics (1977–78), Toronto Blue Jays (1978), San Francisco Giants (1979) and Pittsburgh Pirates (1979).  He compiled a 142–135 win-loss record and 3.70 earned run average (ERA) in 484 major league games.

Billy Beane: 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).  Prior to his front office career, he played in MLB as an outfielder between 1984 and 1989 for the New York Mets, Minnesota Twins, Detroit Tigers, and Oakland Athletics.  He joined the Athletics front office as a scout in 1990.  He was named general manager after the 1997 season, and promoted to executive vice president after the 2015 season.

Bobby Kingsbury: Bobby Kingsbury (born August 30, 1980) in Cleveland, Ohio, is an American baseball player.  He is a two-time Atlantic 10 Player of the Year and went on to play in the Pittsburgh Pirates minor-league organization.  Kingsbury was the first baseball player to earn back-to-back Atlantic 10 Player of the Year Awards, in 2001 and 2002.  He went to school at Fordham where he set an NCAA record for stolen bases in a game (8), and was drafted by the Pirates in the 8th round of the 2002 Major League Baseball Draft, but his excellent glove, a quick bat, an intelligent hitting approach, and his work ethic could have given him a third or fourth-round pick if he'd gone to a warm-weather college.

William B. &quot;Buck&quot; Giles: William Bliss "Buck" Giles (May 7, 1903 – April 15, 1985) was an American baseball player and attorney.  He played second base for the Michigan Wolverines baseball team in 1924 and 1925.  In 1925, he became the first Michigan baseball player to win the Big Ten Conference Medal of Honor.  He was inducted into the University of Michigan Athletic Hall of Honor in 1980.

Tom Timmermann: Thomas Henry Timmermann (born May 12, 1940) is a former American baseball player.  He played professional baseball for 15 years from 1960 to 1974, including six seasons in Major League Baseball as a pitcher for the Detroit Tigers (1969–1973) and Cleveland Indians (1973–1974).  He compiled a 35–35 win–loss record and a 3.78 earned run average (ERA), and recorded 35 saves and 315 strikeouts, in 228 major league games and 548 innings pitched.

Steve Kettmann: Kettmann, despite having written on a wide variety of topics, is best known for his work on several baseball books, most recently "Baseball Maverick: How Sandy Alderson Revolutionized Baseball and Revived the Mets" (Grove Atlantic, April 2015).  The book explores Alderson's role as general manager of the Oakland A's in the 1980s and 1990s, including his role as a mentor to the young Billy Beane, who was later made famous in the movie adaption of the Michael Lewis book "Moneyball".  It also focuses on Alderson's years as general manager of the New York Mets starting in late 2010.

Mike Cherry: Mike Cherry is a former American baseball player who was named an All-American in 1983 by both the American Baseball Coaches Association and Baseball America, the only two recognized selectors in 1983.  Cherry was a pitcher for The Citadel and was drafted in the second round (38th overall) of the 1983 Major League Baseball Draft by the Los Angeles Dodgers.

Eric Duncan: Eric Anthony Duncan (born December 7, 1984, in Florham Park, New Jersey) is a retired American baseball player.  Considered an excellent high school baseball player, Duncan was chosen by the New York Yankees in the first round of the 2003 Major League Baseball (MLB) Draft, and became one of the best prospects in baseball.  However, injuries and ineffectiveness in minor league baseball prevented Duncan from reaching MLB.

Supporting paragraphs: Steve Kettmann Billy Beane
Answer: Billy Beane