In the statement Joshua stated that he noticed a lump on his testicle during the summer, and doctors have since diagnosed it to be testicular cancer. He underwent the surgery to remove the tumor, but sadly will not be ready to suit up for training camp.
It is important for men to check themselves and make sure they don't have any usual bumps or growths on their testicals, and if you feel anything unusual, make sure to get it checked out, better safe then sorry.