William Edward Wagner (born July 25, 1971), nicknamed "Billy the Kid", is an American former professional baseball pitcher who played 16 seasons in Major League Baseball (MLB). He pitched for the Houston Astros (1995–2003), Philadelphia Phillies (2004–2005), New York Mets (2006–2009), Boston Red Sox (2009), and Atlanta Braves (2010). Wagner is one of only six major league relief pitchers to accumulate at least 400 career saves. A left-handed batter and thrower, Wagner stands 5 feet 10 inches (1.78 m) tall and weighs 180 pounds (82 kg).
