Surely he's carrying some sort of niggle. His drop off in form is just too bad to explain otherwise.
I reckon it's got to be this. We'll probably hear about it officially in the offseason but for now they want to 'hide it'.
It's bloody annoying though. For some reason some blokes just can't play with niggles and other blokes can. I think it's been proven conclusively that Zaka can't and hence shouldn't be picked unless 100%
It's highly possible that's the case, but it wouldn't surprise if blokes are thinking, sub consciously at least, of being sure to not kill themselves or risk major damage this year.
I reckon we'll all see a completely different Zaka when his mates get back.