When Rockwall's Andrew Taylor drilled a buzzer-beater from well beyond half-court just before halftime, he gave the Yellowjackets energy and momentum the team lacked in what was a big second quarter for No. 1 Guyer.
Rockwall fed off the shot and controlled the game in the third, using a barrage of 3-pointers to pull within one point. But junior Jalen Wilson began to take over, giving the Wildcats (17-0) the boost they needed to pull away.
Wilson, who found a rhythm after the break, scored eight in the final frame and finished with 19 points to guide Guyer to a 79-73 win Tuesday night.
"Give Rockwall a lot of credit," Guyer coach Grant Long said. "They came in and played hard and had a great game. We just started finishing and making plays — we got out in transition and started pushing it with those two [Wilson and De'Vion Harmon]. "
The Wildcats struggled to contain Rockwall's Samuell Williamson in the first half, and the highly touted recruit scored 15 points to keep the Yellowjackets in the game. But Guyer found a way to slow him down, holding the 6-6 shooting guard to only one made field goal in the final two quarters.
Willamson finished with a game-high 25, but the Wildcats' ability to contain him in the second half made a difference down the stretch.
"Defensively, we picked him up full court," Wilson said. "I was making a mistake by picking him up near the 3-point line, and therefore he was scoring. I had to pick him up full court to get the ball out of his hands."
Although the game wasn't as clean as Guyer was hoping after a dominant showing in the Cy-Hoops Invitational over the weekend, the Wildcats made enough plays late in the game to remain unbeaten.
Senior Grayson Carter finished with 17 points after knocking down a couple key 3-pointers while De'Vion Harmon had 16. JaKobe Coles had a big night rebounding and finished with 11 points.
Guyer will open District 6-6A play at 7:30 p.m. Friday at home against McKinney.
"I'm excited," Harmon said. "We have 14 games in district — every game matters, but these are the ones that really count. It's going to be a lot of fun."
Guyer 79, Rockwall 73
Rockwall (9-6) — Taylor 18, Williamson 25, Whitaker 8, Cowan 5, Grandstaff 16, Wesley 1.
Guyer (17-0) — Grayson Carter 17, JaKobe Coles 11, Ty Mcghie 3, De'Vion Harmon 16, Jalen Wilson 19, Chris Craig 8, Le'Tre Darthard 3, Brandon Bird 2.