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

Major League Baseball Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (AL), ...

pitcher In baseball, the pitcher is the player who throws ("pitches") the baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw ...

. 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 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 {{US-baseball-pitcher-1950s-stub