Visiting during a one-day skills camp, Callinan spent the evening with Rutgers coaches and friends.
"I knew a lot about Rutgers in the beginning and then kind of shied away from it visiting other schools and wanted to get out there more," Callinan said. "But coming back on this visit and everything, it's pretty cool. You always come off a visit saying, ‘wow.' Now Rutgers is in my head. I wouldn't say it changed anything that much, but it definitely had a good positive reaction."
Callinan enjoyed the trip so much that he will be back on campus Thursday for a personal junior day with staff members.
"Things went great," Callinan said. "I really got to see how [offensive coordinator Dave Brock] does everything. I just got to get a better relationship with him. I haven't really known him until now. I thought it was a very great experience.
"I'm coming back next Thursday for another visit to go over with [linebackers coach Dave Cohen] He's going to show me a lot about the academics and the campus for me. We're going to talk about academics and sit down with Brock and he'll talk to me about how I fit in with the offense and all that. That will be an exciting visit."
Callinan did not participate in drills but watch the coaches closely and spent time with Rutgers commit John Tsimis, who plays for rival Bergen Catholic.
"I saw John at the [Nike combine] in Baltimore," Callinan said. "We've been friends pretty much since then. Because of his knee, you feel bad for him and all that even though we're big rivals. It's good that he is still able to find a college and I'm happy for him there."
Tsimis is now recruiting Callinan to join him at Rutgers, but not in an overly aggressive fashion.
"He's not going to try and push me, but he'll do whatever he can," Callinan said. "He's a good kid so I like him."
He does not plan to cut down his list until the end of the camp circuit and said he has no finite plans for a decision.
"I was talking to [St. Peter's Prep head coach Rich Hansen] and he said that now the spring evaluation period is over, they're all going to go back and have meetings and I'll start hearing from some more schools and getting more camp invites soon," Callinan said. "I'd like to [decide] before [the season], but I'm not going to rush it."