The 6-foot-5, 220-pound Opoku, who is currently enrolled at Fork Union (Va.) Military Academy, made the decision today, a day after he met with Scarlet Knights coach Greg Schiano.
He plans to enroll in January and participate in spring practice.
"Just did it,'' Opoku said. "I just prayed on it. I tried to match everything down on the table. I just had to go where my heart felt. I just thought it was the right decision, and that was the best feeling in my heart.
"I had to make that decision.''
His announcement comes as somewhat of a surprise, since Opoku grew up a Rutgers fan.
Opoku grew up 15 minutes from Rutgers Stadium and attended North Brunswick (N.J.) Township High, where he was recruited by the Scarlet Knights.
However, he did not receive an offer, and signed with Temple, only to be caught in a late scholarship crunch and learn the Owls did not have room for him.
After having a strong season at Fork Union, Opoku said he had offers from more than a dozen schools, including Temple and Connecticut.
Opoku said he was trying to call Schiano to tell him the news, but with Rutgers traveling to Louisville today he has been unable to connect.