[2] Holder graduated from University City High School in San Diego, California, in 2012.

After graduating, he enrolled at Grossmont College where he played for their baseball team, posting a .405 batting average with sixty hits and 21 RBIs.

After his freshman year at Grossmont, he then enrolled at the University of San Diego where he played baseball for the Toreros.

[7] He was then a non-roster invitee for the New York Yankees spring training in 2018 and started the year with Trenton Thunder.

[9] He spent the year with Trenton, slashing .265/.336/.405 with nine home runs and forty RBIs over 112 games.