William Edward Wagner (born July 25, 1971 in Marion, Virginia), nicknamed "Billy the Kid", is a former Major League Baseball relief pitcher. He pitched for the Houston Astros (1995–2003), the Philadelphia Phillies (2004–2005), the New York Mets (2006–2009), the Boston Red Sox (2009), and the Atlanta Braves (2010). Wagner is one of only six Major League relief pitchers to accumulate a total of 400 or more saves in his baseball career. A left-handed batter and thrower, Wagner stands 5 feet 10 inches (1.78 m) tall and weighs 180 pounds (82 kg).
