NFL players react to Rob Gronkowski's retirement

After nine seasons in New England, Patriots tight end Rob Gronkowski announced his retirement on social media on Sunday.

"I will be retiring from the game of football today," he said on Instagram.

Gronkowski's fellow Patriots and players from around the league went online to post their congratulations:

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What an honor and privledge to play with you these past nine years @gronk! You accomplished so much and our team was almost unbeatable when you were on the field! Your fun-loving, inspiring, and positive energy made an impact on everybody you came into contact with! Not just that, but for as great as a player you are, you are a better teammate and person. The NFL was a better place with you in it! But I have no doubt you will be a success in anything you do!!! Love you pal!

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