[3] Holder committed to Arizona State, and former coach Herb Sendek after an unofficial visit to campus in May 2013.

[5] Holder was named Pac-12 Player of the Week on November 20, 2017, after averaging 23.7 points, 6.3 rebounds, 5.7 assists and 2.0 steals in three victories.

Ranked #3 in the AP poll and as the last undefeated team in the nation (12–0), on December 30, the Sun Devils played on the road at their historic rival, the Arizona Wildcats in McKale Arena.

Tra Holder was the leading scorer of the game with 31 points, but the Sun Devils fell to the Wildcats 78–84 to begin the Pac-12 Conference schedule.

After going undrafted in the 2018 NBA draft, on July 14, 2018, Holder signed a deal with the Italian club Auxilium Torino for the 2018–19 LBA season.

[10] On January 15, 2020, Holder signed with MKS Dąbrowa Górnicza of the Polish Basketball League (PLK).