Sanu set the Big East and school record for receptions in a season with 115 in 2011, while gaining 1,206 yards, the third-most in a single season in school history and eighth-most in a single Big East season.
A clearly emotional Sanu said it was a tough decision to make.
"I definitely was thinking about coming back," Sanu said. "I love Rutgers so much, and just being around my teammates all the time. I'm going to miss that aspect of it."