He will be at Rutgers this Saturday for the spring game, and then the Wilmington (Del.) Concord standout will be ready to make a decision.
"This is my final visit and I will make my decision soon," the 6-foot, 225-pound Roberts said. "Those are my top two."
Roberts' brother, linebacker Avery Roberts, is a freshman at Nebraska and played for both teams in Saturday's spring game.
And while Avery made several trips to campus before his commitment in the 2017 class, this was Grahm's first venture to Lincoln.
"It was better than I expected," Roberts said. "It was the place to be. Everybody was there to see and support the football team. It was good with the fans knowing me. I was looking at their offensive scheme and style, and how their running backs react to the situations they're in."
Roberts received the requisite campus tour and academic presentation, and he also spent plenty of time with coach Mike Riley and running backs coach Reggie Davis.
"I had a good talk with coach Riley and the running backs coach," Roberts said. "(Riley) talked about how the team is about football and about character, and he is looking for me to come down and be a big part of the team."
Nebraska added three commitments during the weekend, and it got Roberts thinking.
"It definitely gave me a big boost in regards to my decision," Roberts said. "The team is young, and they're going to build with my class and the class previous. I thought about it a lot."
However, before making a decision, Roberts has one more trip to make.
He will be at Rutgers for the spring game. It is his second trip in less than two months, and he is returning to see more of the program.
"I want to see a place that the players love to be at, the fans love to cheer for and everybody comes together as one to enjoy a football game," Roberts said.
Roberts remains in contact with the coaching staff, particularly running backs coach Lester Erb.
"They say if I come there, I would be their biggest back," Roberts said. "I would give them an advantage and something they never had before and I could be that main back."