"It's huge," George said. "Zach really provides a good boost for the team, because he's so consistent. Every time, he's such a good shooter. You can just count on him for making shots and playing defense, so it really helps the team. It really opens up the court."
While Casto has just recently shined offensively, George said Casto has always ranked among the area's top threats.
"He is one of the best shooters," George said. "Him and (former Irish player) Haston Gerencir last year. He's one of the best shooters I've ever seen, at least in high school basketball."
Casto's reputation as a scorer continues to grow, as his confidence, but Casto forged the foundation of his career as a defender, McClanahan said.
"He's realized that for him to play last year it was primarily as a defensive role and a rebounder, and he brought some strength to us," McClanahan said of Casto. "This year, to be a starter, he needed to go that route first, and then once he understood his defensive role he expanded his offensive role, and with that expansion comes confidence and with confidence comes success."
To Casto, his role is rooted in the fundamentals.
"(I see myself) primarily for being a teammate, of course," he said, "so that is getting rebounds and passing the ball and being unselfish; scoring and taking good shots, helping to win the game, of course."
As scoring has become an increasing part of his contribution, Casto said it's a credit to his team.
"I think it's because of the confidence my teammates and coaches have instilled in me," he said. "Every day in practice they do that for me."
On the court and away from the floor, McClanahan said Casto continually improves as a result of his work ethic and confidence.
"I have watched Zach Casto grow up in the four years he's been in this program, and I am very proud of the young man, not only the player, but the young man he's become," he said, "and I hope he continues to grow."
Those extra points by Casto won't be discouraged either as Catholic looks to defend its Class A state title.