According to his AAU coach and mentor, Don Anderson, Sampson, who is down to four schools, will likely make a college decision very soon.
"It'll be less than a month," Anderson told Scout.com. "I believe it'll be less than a month."
"He's probably getting ready to pop the whistle," he added. "He feels like he's trying to focus at Brewster. He leaves for Brewster tomorrow. We want to nail it down and go ahead and get this over with."
On Wednesday, Sampson, who is rated No. 22 by Scout.com, visited Bruce Pearl and his staff at Tennessee with his mother and Anderson.
"The visit with his mom yesterday was a great success," Anderson said. "We were met by coach Tony Jones. We got the chance to meet with the academic advisors and tour the educational building and the business center."
"We met all the staff members of the basketball team," he added. "Then we broke down video and they showed him different clips and highlights of where they think he'll be playing at."
According to Anderson, the Volunteers made up some ground and are firmly in the mix for his services.
"Bruce Pearl was just an overall gentleman," he said. "His mom really liked the visit and liked the coaching staff. They treated us like family."
At this point, Sampson doesn't have any other visits set up, but he's hoping to get to Louisville before he makes his collegiate decision.
"He may do an unofficial to Louisville," Anderson said. "He can't do an official because he has to be in school. He'll probably get with the coaches from Louisville and set up a visit."
When asked if he had plans to visit Baylor or Saint John's, Anderson said it looked unlikely at this point.
"I don't think he's going to visit those guys. We were going to try and get to Saint John's for an unofficial visit tomorrow, but it doesn't look like it'll get done because of time constraints. We have to get to Brewster."
According to Anderson, Sampson, a five-star prospect, is starting to develop a few favorites.
"It's not open," Anderson said. "I think it tightened up yesterday with the trip to Tennessee. He hasn't really seen Louisville, so I just believe Tennessee, St. John's and Baylor are tied."