Oldsmar (Fla.) Christian coach Jordan Fair confirmed the news to Scout.com.
"He kind of wanted to stay close to home," Fair said. "He feels like he has a good support system here. He feels like he has a chance to make a major impact on the program. There really hasn't been a high scoring guard in their program since Dominique Jones."
Fair commended the job the South Florida staff did recruiting Holston.
"They did a really good job recruiting him," Fair said. "Coach [Stan] Heath had a really hands on job in this recruitment and coach [Steve] Roccaforte did a really good job with his recruitment.
"I think with the progression that he's had over the past two years I think he can make a major impact at South Florida," Fair said. "I think he could potentially be a go-to scorer at South Florida. He shoots it at a high level, is very athletic and if he continues to improve his handle it'll add a whole new dimension."
Holston is USF's first verbal pledge in the 2014 class.