Gibson came into the World Series with a regular - season earned run average ( ERA ) of just 1.12 , a modern era record .
He pitched complete games in Games 1 , 4 , and 7 .
Gibson came into the World Series with a regular - season earned run average ( ERA ) of just 1.12 , a modern era record , and he pitched complete games in Games 1 , 4 , and 7 .