Planning official visits to Missouri Jan. 18 and Rutgers Jan. 25, expect a decision to come close to National Signing Day, Harrell said.
He will be at Cincinnati this weekend.
"His final trip will be at Rutgers and then he'll make a decision either on signing day or close to then," Rutgers is his last one. They've been recruiting him for a while as a tight end."
Johnson decommitted from Miami and the Hurricanes are no longer involved in his recruitment, Harrell said.
"As to why or what happened, that's all up to him and how he feels, but I know he's very happy with the direction of his recruiting," Harrell said.
Rutgers has tight end commitments from Archbishop Wood's (Warminster, Pa.) Nick Arcidiacono and Lake Mary (Fla.) Taylor Marini but has been involved enough with Johnson to schedule him for an official visit.
"He's a pretty versatile level and will probably be the same at the college level," Harrell said. "He has decent size, 235-pound kid right now. Once he gets in the weight room and puts on some muscle mass and gets used to that level, I think he'll be a pretty good player."
Jesuit used Johnson primarily as an interior receiver in the spread offense, but also as a safety, wildcat quarterback and kick returner.
"He has excellent hands," Harrell said. "He goes up, has good ball skills and he's a learner. He's an inside guy, whether you got him attached [to the line] at tight end or flexed out in the spread, either one works. We moved him around in multiple formations. By the end of the season, we had him blocking pretty well too, but that's something that would have to get stronger in a pro-style [offense]."