Complex sentence: William Francis Plummer (born March 21,1947 in Oakland, California) is a former catcher in Major League Baseball who played for the Chicago Cubs, Cincinnati Reds and Seattle Mariners.
Split into simpler sentences: William Francis Plummer (born March 21,1947) is an American former professional baseball player. He played in Major League Baseball as a catcher for the Chicago Cubs, Cincinnati Reds and Seattle Mariners.