The sport has also given Holmes, an only child, siblings and a role model. Holmes refers to his teammates as brothers and Coach Agustin Heredia as a father figure.
Heredia gave Holmes a shot on varsity after he earned it in the summer leading up to last season.
"I love my coach," Holmes said. "Thanks to my coach for everything. He's like my father figure in my life since I don't have a father.
"He's just always been there for me. If I were going to do something bad, I would always have to deal with him. He was pretty much a father. You don't want to disappoint him."
Holmes has made Heredia proud.
The senior is a big reason why Estancia this season is in contention to win the Orange Coast League title, which would be the program's first crown in six seasons. Holmes has come a long ways since the first time Heredia saw him play as an eighth-grader at TeWinkle Middle School.
Back then, Holmes said he was chubby. The weight stood out more to Heredia than his play on the court.
"I would watch him play at lunchtime, and as a coach, you kind of figure out who are going to be your guys in the future," said Heredia, a physical education teacher at TeWinkle. "I will be honest with you, I liked Ray. He's a nice kid. He was the type of kid who [I said], 'Oh, yeah, he will be on the team, but he really won't make a contribution.'
"He was small and kind of had an awful looking shot."
Holmes' shooting form has not changed much, just that he can now knock down jumpers from practically anywhere on the floor.
It might take Holmes some time to get a shot off. That is because the left-hander dips before he releases the ball. Holmes said the dipping motion gives him a better arc on the ball.