More All Blacks v England coverage
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Whitelock comes of age as a lineout master in last quarter
This year has been horrible for Carter. The training ground has claimed him a few times and he's only managed about 150 minutes of rugby in the last four times he's started.
For all his seeming natural athleticism, he's actually not that well put together. Combine that with the pounding he's taken in more than a decade of professional rugby and maybe it's little wonder that every bit of him appears either broken or about to break.
Some of his issues are caused by age. It's a rotten thing, but happens to everyone, that bits and pieces become strangely unreliable after 30 years of service.
A bit of his recent bad luck has been exactly that: no one is immune from the vagaries of the sport. Some of his pulls, strains and cracks are wear and tear and some of his dramas are caused by genetics, biology and physiology.
In a sense, though, the cause of his injury problems doesn't particularly matter. Everyone in the management of the All Blacks and Carter himself are now hoping that time off will sort out his medical woes. He's so damaged now that it feels his only hope of fulfilling his World Cup dream is to rest, rebuild and somehow come back to rugby with every problem fixed.
Are his various problems inter-related? Does protecting one part of his body lead to him damaging another. Fix the niggles and fix the man? Is that going to be the case? Will his sabbatical be the magic bullet and see him return to rugby bigger, stronger, fitter and faster. We haven't see Carter at his best - consistently at his best - since the early part of 2011.
There have been moments since - the test against Scotland last year being the obvious one - where he's been his old self.
It hasn't been enough.
Injury has taken too much out of him and the upcoming sabbatical is his chance to fight back and resurrect his career.
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