Walter Edward Masterson III (June 22, 1920 – April 5, 2008) was an American right-handed pitcher in Major League Baseball who played for the Washington Senators, Boston Red Sox and Detroit Tigers. He started the 1948 Major League Baseball All-Star Game for the American League. Born in Philadelphia, Masterson attended Northeast Catholic High School and signed with the Senators at age 17. He was listed as 6 feet 2 inches (1.88 m) tall and 189 pounds (86 kg). He died of a stroke at age 87 at Duke University Hospital in Durham, North Carolina.