On Day 1, the 6-foot-2, 203-pound receiver earned a spot in the top-10 combine challenge, where he ran the 40-yard dash in 4.49 seconds and sprang 47.1 inches in the vertical jump.
"I work hard and everything, but at the same time, just to be a step ahead of some of the best people out here, I can't have an explanation for that," Imatorbhebhe said on Thursday, when asked how he developed his speed and jumping ability.
Imatorbhebhe, from North Gwinnett High in Georgia, announced his commitment to the Trojans in May. His brother, Daniel, said last month that he would transfer from Florida to USC. Both of them were on campus during USC's Rising Stars camp in June.
"We just saw the tremendous opportunity for us out there, not only as football players, but as a person – it's the people that we want to be and we just feel like we can expand ourselves as people," Imatorbhebhe said.
Imatorbhebhe said he would make an official visit to USC and could also make a visit to Georgia.
Asked if he could change his commitment before signing day, Imatorbhebhe said, "I don't know."