The former Kiwis captain has played his last test and is unavailable for selection for next weekend's match against England in Denver.
He says he wants to spend more time with his family.
He says if it was still only him he had to think about he'd milk it for all it's worth.
Mannering is non-committal over whether his international retirement will lead to him re-signing for a further year with the Warriors.
Meanwhile, Warriors captain Roger Tuivasa-Sheck trained with the side today, having missed the win over Manly with an ankle sprain.
Coach Stephen Kearney says he will travel to Townsville for Friday's NRL match against the Cowboys.
He says they haven't 100 percent made that decision yet.
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