Seahawks receiver Cooper Kupp made a big impact against his former team in Sunday's NFC Championship after a lot of people ...
On Monday, he admitted that he did something he shouldn't have done.
4don MSN
Cooper Kupp helped Seahawks clinch NFC Championship, but he committed 'cardinal sin' to do it
Seahawks wide receiver Cooper Kupp spoke on one mistake he felt he made in the team's win over the Rams on Sunday.
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