Adriano's last club was Miami United, where he played in 2016.
However, at 35, the former Brazil international striker says he's ready to pull on the boots again.
“Although I wasn't playing, I did keep in shape. I want to get back to training, even without a club. I want to do it for me, to prove I can overcome my limitations. It's the only way to realise if I can still play or not," he stated.