C George Mitterwald has a career day in leading the Cubs to an 18 – 9 win over the Pirates. He goes 4-for-4 with a walk, a double, three homers, and 8 RBI. The next Cub catcher to hit three homers in a game will be Dioner Navarro, in 2013.

On April 17, 1974 – – C George Mitterwald has a career day in leading the Cubs to an 18 – 9 win over the Pirates. He goes 4-for-4 with a walk, a double, three homers, and 8 RBI. The next Cub catcher to hit three homers in a game will be Dioner Navarro, in 2013.

 

Source 

Baseball Reference April 17