The Athletics hit three home runs in an 11 – 9 win over the Red Sox, giving them a major league record-tying 18 in four games. They hit four four days earlier, eight two days ago, and three yesterday in addition to today’s 3.

On June 29, 1996 The Athletics hit three home runs in an 11 – 9 win over the Red Sox, giving them a major league record-tying 18 in four games. They hit four four days earlier, eight two days ago, and three yesterday in addition to today’s 3.

Source
Baseball Reference June 29