Premise: Donald Joseph Stanhouse (born February 12, 1951 in Du Quoin, Illinois) is a retired baseball pitcher who had a ten-year major league career from 1972 to 1980, 1982. He played for the Texas Rangers and Baltimore Orioles of the American League and the Montreal Expos and Los Angeles Dodgers of the National League.
Hypothesis: Donald Joseph Stanhouse started playing baseball at the age of nine.