At Fenway Park, Frank Robinson and Brooks Robinson hit back-to-back home runs in the 1st inning off Dave Morehead, to lead the Baltimore Orioles to an 8 – 1 victory over the Boston Red Sox. Jim Palmer pitches a five-hit complete game and helps himself by hitting a homer in the 2nd.

On April 13, 1966 – – At Fenway Park, Frank Robinson and Brooks Robinson hit back-to-back home runs in the 1st inning off Dave Morehead, to lead the Baltimore Orioles to an 8 – 1 victory over the Boston Red Sox. Jim Palmer pitches a five-hit complete game and helps himself by hitting a homer in the 2nd.

Source:
Baseball Reference April 13