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In 2017, Holder was named as the Best Defensive Shortstop in the minor leagues. Holder was invited to the Arizona Fall League in 2017 and hit .333 over 45 at bats. He was then a non-roster invitee for the New York Yankees spring training in 2018 and started the year with Trenton Thunder. He also spent time during the season with the Charleston RiverDogs and the Trenton Thunder. Over 48 games between the two teams, he hit .257 with three home runs.