In a statement posted on his Twitter account, Browns wide receiver Josh Gordon stated that he will be away from the team at the start of training camp as part of his "overall health and treatment plan". General manager John Dorsey said Gordon will be placed on the non-football injury list until he is ready to return. There is no pending suspension.
While this seems very out of the ordinary, Gordon is obviously in a very unique situation with respect to his personal life, as well as his football career. It sounds like this is just planned maintenance to make sure Gordon is healthy, happy, and safe.