Arizona's Tempe - - J.J. Watt, a defensive lineman with the Arizona Cardinals,

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tweeted on Tuesday morning that he will be leaving his position after this season "Koa's debut NFL contest.

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My final home NFL game. 

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 My heart is just overflowing with admiration and affection. 

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 It's an absolute honour and pleasure "He commented next to a picture of himself holding Koa as a baby and spending time with him.

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Between the Cardinals and the Tampa Cove Pirates on Sunday evening, tweeted with Peter Kelia.

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 In his 12-year career, Watt has two games left for both the San Francisco 49ers and the Atlanta Birds of Prey.

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He'll leave the game as one of the most productive protected players of his generation and perhaps the first person to vote for Form Lobby of Fame.

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J.J. Watt of the Cardinals declares this to be his final NFL campaign.

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