Thomas, a cornerback who left the team in midseason, will enroll at Rutgers and attend classes Monday when the semester brings, and will be eligible to play in the 2014 season.
Thomas started three of the first six games for the Scarlet Knights during the 2013 season, but left the program abruptly during a bye week. At the time, Rutgers coach Kyle Flood said Thomas told him during a team meeting that he wanted to explore playing baseball.
"He's decided to leave the program," Flood said at the time. "He's going to pursue a career in baseball and we wish him the best for Ian and his family."
The return of Thomas, who will be a red-shirt sophomore, bolsters a secondary in need of depth. The Scarlet Knights spent much of the second half of the season with Gareef Glashen, who will be a senior, and freshmen Nadir Barnwell and Anthony Cioffi playing the bulk of the time.
With the move to the Big Ten, Thomas will be a front-runner to win a starting spot.
At 6-foot-1, 195 pounds, he is also the long and rangy type of cornerback the Scarlet Knights want to utilize. As a red-shirt freshman, Thomas made eight tackles and intercepted one pass.