 In his father's first game as a Mariner, on August 31, 1990, the pair hit back-to-back singles in the first inning and both scored.On September 14, the pair hit back-to-back home runs in the top of the first off California Angels pitcher Kirk McCaskill, becoming the first father-son duo to hit back-to-back home runs.The duo played a total of 51 games together before Griffey Sr. retired in June 1991.