Jack William O'Connor (born June 2, 1958) is an American former

Major League Baseball Major League Baseball (MLB) is a professional baseball league composed of 30 teams, divided equally between the National League (baseball), National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada. MLB i ...

pitcher In baseball, the pitcher is the player who throws ("Pitch (baseball), pitches") the Baseball (ball), baseball from the pitcher's mound toward the catcher to begin each play, with the goal of out (baseball), retiring a batter (baseball), batter, ...

. He played all or part of six seasons in the majors, between and .

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1958 births Living people American expatriate baseball players in Canada Baltimore Orioles players Baseball players from San Bernardino County, California Calgary Cannons players Indianapolis Indians players Jamestown Expos players Lethbridge Expos players Major League Baseball pitchers Memphis Chicks players Minnesota Twins players Montreal Expos players People from Twentynine Palms, California Rochester Red Wings players Syracuse Chiefs players Toledo Mud Hens players West Palm Beach Expos players 20th-century American sportsmen {{US-baseball-pitcher-1950s-stub