A stellar performance there caught the eye of the USC coaching staff, and Moore ended up receiving an offer from the Trojans.
And the school he had been dreaming about going to since he was an elementary schooler ended up being the school he received his commitment, in an agonizing decision.
"Byron got an SC offer and he committed to them," said his father, Byron Sr. "He loves the coaches at UCLA and he loves Westwood. But SC is where his heart has been since he was seven years old. He's been going to camps there since he was in seventh grade and been going to games there. It was a tough decision, but he was following his heart."
The younger Moore has emerged as one of the top prospects on the West Coast, starring at numerous camps and combines. But the performance at USC put it over the top.
"He was just going there to compete and he ended up doing really good," said Moore Sr.
Moore Sr., said he and his son had a good conversation with the UCLA coaching staff on Sunday night, particularly DeWayne Walker and Rick Neuheisel.
"They understood," said Moore Sr. "Especially Coach Walker, he went through this last year with his own son. But they also said they're not going to give up and there is a long way until Signing Day."
The Trojans, meanwhile, add their 15th commit in the class of 2009, and fourth at safety in Moore.
Last fall, Moore earned all-City honors when he caught 41 passes for 823 yards and seven touchdowns while adding 86 tackles, five interceptions and two deflections. He also amassed 343 yards in kickoff returns.
Academically, Moore has a 3.0 GPA and scored a 1200 on the SAT.
He has been selected to the U.S. Army All-American Bowl next January.