Castillo had opened with a 4-under 68 for a three-shot lead on the field after Day 1. When he came back with 65, it pushed him to 12 shots ahead of runner-up Erick Liscio. Castillo was the only player to get under par – in fact, he was 11 under.
Behind Liscio in second, Nicholas Cantlay was solo third at 2 over.
Two men tied for second at 5 over, including RSM Amateur winner Jack Solis, a Cal Baptist sophomore. Joshua Hu was also at that number.
In the women’s division, Katie Stribling also authored a distant victory with her 13-over 157 total. Stribling is a freshman on the Irvine Valley College golf roster. Kamryn Garcia came in second at 22 over.
