Premise: John Robert Gamble (born 1948) is a former professional baseball shortstop. He played in 13 games in two seasons for the Detroit Tigers of Major League Baseball. He was drafted in the 2nd round of the 1966 Major League Baseball Draft by the Los Angeles Dodgers and acquired by the Tigers in the 1970 Rule V Draft.
Hypothesis: John Robert Gamble did not play as pitcher for the Tigers.