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The 6-foot, 225-pound Roberts, who is the No. 2 player in Delaware, added he is also eyeing a Temple visit.
"Every school gets a good look from me," said Roberts, whose brother, Avery Roberts, is a freshman at Nebraska. "I haven't thought about (a decision) yet. I was leaning toward the end of spring, but I might just carry on until next (season) and see if I pick up any more offers."
Roberts plays at Wilmington (Del.) Concord, and made the 90 minute trek to Rutgers for a junior last in late February.
"They said they are looking for a big back like me," Roberts said. "It means a lot to get the offer. (Running backs) coach (Lester) Erb and the offensive coordinator (Jerry Kill) told me about the offer. They were talking about the style of offense, they were talking about the downhill (style), and it seems like a very assertive offense."
The younger Roberts made a trip to Rutgers when his brother was going through the recruitment process in the 2017 cycle, but he noticed a different vibe on the campus with Scarlet Knights coach Chris Ash beginning his second year in charge.
"It was a great experience. It's a climate change," Roberts said. "You can feel how much they really want you, and they show interest. They want you to be a part of the program."
Nebraska's spring game is April 15, and Roberts plans on going to see Avery play, and continue his bond with the coaching staff.
His main contacts are running backs coach Reggie Davis and offensive coordinator Danny Langsdorf.
"Avery said it is a good environment, and the people are very friendly," Grahm said. "He said it was everything he thought it was going to be, and the program is very good, but challenging as well."
Because of Avery's recruitment, and since the Cornhuskers offered Grahm early, he already knows a lot about the situation.
"I see the program is all about the players, all about the environment," he said. "At the end of the day, they get their players an education. I get a good positive vibe from (Davis and Langsdorf). It seems like they are all about their family, and they are looking for a good player to come help them out.
"It's a balanced (offense). They are really looking to use a big back like me."