Rookie infielder Donnie Walton had a quiet, yet historic debut for the Seattle Mariners on Tuesday night at T-Mobile Park.

The 25-year-old, who is the No. 28 prospect in Seattle’s organization, was promoted from Double-A Arkansas hours before Seattle’s homestand opener against the Reds, and didn’t enter the game until the ninth inning, when he came in as a defensive replacement at shortstop.

Walton didn’t see any action on his side of the diamond — the first two Reds batters of the inning flew out, and the third an final of the game grounded out to first as the Mariners wrapped up a 4-3 win — but his debut did have plenty of meaning.