Talented Purdue freshman big man Caleb Swanigan has not yet been cleared by the NCAA, Boilermakers coach Matt Painter confirmed to ESPN.
"He's still going through the process," Painter told ESPN.
The news was earlier reported by Bleacher Report.
Sources said the NCAA has interviewed both Swanigan and his legal father, agent Roosevelt Barnes, about their relationship.
According to Bleacher Report, Barnes -- a sports agent who graduated from Purdue -- adopted Swanigan in 2011, when he was a 6-foot-2, 360-pound eighth-grader.
Swanigan, who grew up in Lafayette, Indiana, was living in a homeless shelter in Salt Lake City, Utah, at the time. According to Bleacher Report, his father was battling a substance abuse problem, his mother wasn't working and all five of his older siblings had dropped out of high school before graduating.
Swanigan has lost more than 100 pounds and is now 6-9, 250 pounds.
"I adopted Biggie because I loved him unconditionally," Barnes, 57, told Bleacher Report. "I wanted to show him that no matter what happened, I wasn't going anywhere. I felt like it was my responsibility as a man to help this kid, because no one else was going to do it.
"If I was going to go out and get a kid for basketball reasons, I'd go find a Chris Webber or a Shaquille O'Neal -- a freak. The only thing freakish thing about [Swanigan] was how many calories he could devour. Maybe if I wanted to develop the next hot dog-eating champion, the next Joey Chestnut, people would have a legitimate gripe."
Swanigan was the prize of Painter's recruiting class, choosing Purdue over Cal and Michigan State after initially committing to play for Tom Izzo and the Spartans. He was a McDonald's All American and was ranked No. 9 in the ESPN 100 for the Class of 2015.
Purdue opens its season Nov. 13 against North Carolina A&T in West Lafayette.