Annan plays at Lake Forest (Ill.) Academy, but the 6-foot-5, 275-pounder works out at a training facility in nearby Chicago. He recently enjoyed Chicago Bears linebacker Khaseem Greene as a guest speaker.
"He told me that Rutgers is one of those great programs," Annan said. "He was talking about how highs school football has changed, and players are more developed when they get to college. He was talking a lot about football, and about how Rutgers was important for him."
Greene was a fourth-round pick in 2013 out of Rutgers, and had nothing but positive comments about the school when speaking to athletes in the area.
"He said it's just a great community with great guys," Annan said. "He said he loves Rutgers. He said it's a good place to go if you want to make your dreams possible."
Rutgers associate head coach Norries Wilson watched Annan today, and came through with an offer via cell phone after leaving the school.
"It was a really good feeling," Annan said. "I mean, every offer is, but it felt good to get an offer from a program like Rutgers. I know it's a good program. They definitely are strong academically and athletically, and New Jersey is a great place."
Rutgers is the second Big Ten and third power-five offer for Annan, who has no leaders or plans for a decision.
Annan hopes to visit Rutgers during the summer to learn more about the school and its Big Ten transition.
"It's very exciting about the Big Ten," Annan said. "I grew up watching Michigan State and Michigan and those kinds of schools. I would love to compete in the Big Ten and play with schools like that."