Says he would quit golf immediately if his wife, Graycie, could not travel on the road with him.

He and his wife, Graycie, share a chocolate labrador named Henlee.

Did not drive a car until his senior year of high school because he "didn't want to pay for gas and insurance, and (he) lived at the golf course, so (he) didn't need a ride anywhere else." Also noted Graycie drove them everywhere when they went on dates.

Broke his right foot at his wedding in 2017 and played all five events of Sam Houston State's fall 2017 schedule in a walking boot with finishes of T4-T18-T11-4th-T16.

Works part time renovating his home as a plumber, electrician and demolition -- which is his specialty.

Loves duck hunting; he says if professional duck hunting was a thing, he'd do that instead of professional golf; his dog, Henlee, also enjoys duck hunting.

Enjoys cooking, and says he tries to eat healthy.

Earliest golf memory is his father, William IV, teaching him the interlocking grip to improve his ball striking and gaining 50 yards immediately.

Favorite athletes are J.B. Mauney, a rodeo cowboy and multi-time Professional Bull Riders world champion, and whoever is playing for Texas A&M.

Played five seasons at Sam Houston State University (2016-21), where he earned 2021 All-America Third Team recognition (the first such honor in school history) and was named the 2021 Southland Conference Co-Golfer of the Year.

Helped Sam Houston State reach the 2021 NCAA Championships, marking the program's first appearance; he stood second individually at the NCAA Stillwater Regional through two rounds, but was ruled out of the final round due to COVID-19 contact tracing and gave a "passionate speech from his hotel window" before the team set off for the final round. Holcomb later finished T8 individually at the 2021 NCAA Championships, notably finishing ahead of Arizona State's Kevin Yu (T13), Pepperdine's William Mouw (T13), Georgia's Davis Thompson (T17), Oklahoma State's Austin Eckroat (T17), Oklahoma's Logan McAllister (T17), and Florida State's Vincent Norrman (T29).

Lone collegiate victory came at the 2019 Bentwater Intercollegiate, Sam Houston State's home event at Bentwater Country Club in Montgomery, Texas.

Reached the semifinals of the 2019 U.S. Amateur Championship at Pinehurst Resort & Country Club; he notably defeated Ludvig Aberg in the Round of 32, Pierceson Coody in the Round of 16, and Australian Karl Vilips in the quarterfinals before he fell to John Augenstein in the semifinals.

Qualified for match play at the 2021 U.S. Amateur Championship at Oakmont Country Club, but fell to Devon Bling in 21 holes in the Round of 32.

Won the 2016 UIL 3A State Championship by six strokes as a senior at Crockett (Texas) High School.