In the first game of a doubleheader, Mickey Mantle ties the score with a 2-run homer in the 6th, but rookie Reggie Jackson breaks the tie in the 8th with his 9th homer of the year. The A’s win, 5 – 2.

On June 29, 1968 In the first game of a doubleheader, Mickey Mantle ties the score with a 2-run homer in the 6th, but rookie Reggie Jackson breaks the tie in the 8th with his 9th homer of the year. The A’s win, 5 – 2.

Source
Baseball Reference June 29