I reckon he's gone. If you watch players at the end of their careers there is moment that they lose speed/reflexes/strength and their ability to compete is what is an incredibly demanding game disappears. Its amazing that the end comes so quickly. Anyway Carr has reached that point - he can no longer cover his deficiencies with endeavour, scragging etc.
There are only a few players that seem to be able to stretch this much past 30 - they are the superstars of longevity - Harvey, Bartlett, Tuck