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Sonny-Bill Williams of the Australian Rugby League team the Canterbury Bulldogs changes his shirt during a training session at Leeds Met University's sports complex on January 31, 2005 in Leeds, England. (Photo by Mark Thompson/Getty Images)

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Sonny Bill Williams of the All Blacks changes his shirt during the IRB 2011 Rugby World Cup Pool A match between New Zealand and Tonga at Eden Park on September 9, 2011 in Auckland, New Zealand. (Photo by Ryan Pierse/Getty Images)

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Sonny Bill Williams of the All Blacks looks on after his shirt was ripped during the IRB 2011 Rugby World Cup Pool A match between New Zealand and Tonga at Eden Park on September 9, 2011 in Auckland, New Zealand. (Photo by Phil Walter/Getty Images)

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New Zealand All Blacks Sonny Bill Williams takes off his tee-shirt during the 2011 Rugby World Cup pool A match between New Zealand and Tonga at the Eden Park stadium in Auckland on September 9, 2011. (Photo by GABRIEL BOUYS/AFP/Getty Images)

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New Zealand All Blacks Sonny Bill Williams wears a new tee-shirt during the 2011 Rugby World Cup pool A match between New Zealand and Tonga at the Eden Park stadium in Auckland on September 9, 2011. (Photo by GABRIEL BOUYS/AFP/Getty Images)

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The tattooed leg of Sonny Bill Williams of New Zealand tackles team mate Kieran Foran during a New Zealand training session at the Parc des Sports Stadium on October 30, 2013 in Avignon, France. (Photo by Jamie McDonald/Getty Images)

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Sonny Bill Williams of the All Blacks poses for a photo during the New Zealand All Blacks portrait session at The Spencer on Byron Hotel on June 24, 2015 in Auckland, New Zealand. (Photo by Hannah Peters/Getty Images)

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New Zealand All Blacks centre Sonny Bill Williams 's tattoo (R) is pictured during a community coaching event with young players of the London Harlequins in London on September 13, 2015 ahead of the 2015 Rugby Union World Cup. (Photo by GABRIEL BOUYS/AFP/Getty Images)

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New Zealand All Blacks centre Sonny Bill Williams attends a training session in Swansea on October 15, 2015 ahead of their 2015 Rugby Union World Cup quarter-final match against France. (Photo by GABRIEL BOUYS/AFP/Getty Images)