McCarthy, who played at Texas, finished at 18-under 262 on the course that will host the AT&T Byron Nelson in May. Defending champion Juan Fernandez of Paradise Valley, Ariz., and Zach Cabra of McKinney, fired final rounds of 66, finishing second at 270.
"I feel very relieved. I had a hard time sleeping last night," McCarthy said. "It all clicked this week, and having [my caddie] Brandon definitely helped. It was huge. I couldn't have done it without him. It's a great list [of champions]. I consider myself fortunate to be on [it]. Ben Crenshaw, being a Longhorn, I grew up idolizing him -- the designer of [Trinity Forest], a class act through and through. To be on the list with him and Mr. [Lee] Trevino and Jackie Burke Jr. is a great feeling. It's humbling."
Texas A&M senior Andrew Paysse of Temple finished fourth at 8-under 272 and was the low amateur. Ben Kern, head pro at Oeste Ranch Golf Course in Weatherford, claimed Low PGA Professional honors with a 3-under 277.
Brax McCarthy ’10 is the son of Tom McCarthy ’73 and nephew of Ben McCarthy ’77 and Patrick McCarthy ’82.