We don't know exactly what his problem is.
Not yet, no. Everything he's shown is possibly fixable physically. Mentally, if he's decided to act like a kid instead of taking this seriously as his vocation, that might take a wakeup call like being scratched a bunch, punched in the face by a teammate or two or traded. I'm hoping he gets the sit-down from someone he respects and they kick his ass in the right direction.