PRIOR TO CAL STATE FULLERTON (2016-17)
Castillo began his college career at UNLV where he competed in four tournaments while averaging a score of 75.42... Castillo recorded a low score of 68 and had a best finish of 11th place. 

HIGH SCHOOL
A 2016 graduate of Valencia High School in Placentia, Calif. ... Earned four varsity letters for the Tigers ... In 2012, won the AJGA Mission Hills tournament and the FCG World Championship at PGA West Stadium Course ... Other winners of the Mission Hills tournament include Tiger Woods, Phil Mickelson, Patrick Cantlay, Sihwan Kim, and former Rebels James Oh Seung Su Han, Ryan Keeney and current Rebel Justin Chong ... In 2013 he established himself as one of the top-ranked junior players in the nation when he qualified for the U.S. Amateur at Atlanta Athletic Club and also achieved medalist recognition at the AJGA Polo Classic at PGA National Resort ... Was ranked 10th nationally by Polo Junior Golf Rankings as the time ... In 2014, was medalist at the U.S. Amateur Qualifier at Old Ranch Country Club ... In 2016, tied for sixth at the California State Open Qualifier at Oak Valley Golf Club and made the cut at the California State Open at Bear Creek Golf Club.

PERSONAL 
Derek Keoni Castillo was born March 10, 1998, in Orange, Calif. ... Majoring in marketing ... The son of Mark and Kim Castillo ... Enjoys fishing ... Has a brother, Ricky (15), and a sister, Kelli (12).