As a 20-year-old, Masterson lost 12 games in a row for the 1940 Senators, finishing 3-13. His 5-9 record in 1942 included four shutouts. The bespectacled hurler spent almost three years in the military, mostly playing for naval teams. He won a career-high 12 games in 1947. As the AL’s starting pitcher in the 1948 All-Star Game, he gave up a first-inning, two-run homer to Stan Musial, but the AL won 5-2. He finished the year 8-15. Masterson struck out Mickey Mantle five straight times in 1951, which contributed to Mantle’s being sent back down. The Senators later made Masterson their pitching coach.