Under the tuck rule, if a passer is in the act of bringing the ball down into his body rather than throwing it and loses control, it is ruled an incomplete pass.

WSJ: NFL could eliminate tuck rule

This census is surely incomplete, so please pass along additions or corrections.

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When quarterback Colin Kaepernick's pass to Michael Crabtree fell incomplete with 1:46 left, the Ravens had virtually clinched their second title.

WSJ: Super Bowl XLVII: Baltimore Ravens Have Just Enough Power to Beat San Francisco 49ers