Tom Brady won't be on the New England Patriots in 2020, and the sports world is trying to process the news.

The 42-year-old quarterback announced Tuesday on Twitter and Instagram he'll continue his "football journey" elsewhere and leave New England in free agency.

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It's the biggest development of the NFL offseason -- indeed, in the entire sports world -- that has major ramifications for the entire league.

Several of Brady's now-former teammates already have reacted, including quarterback Jarrett Stidham, who joined wide receiver Jakobi Meyers and safety Patrick Chung in wishing TB12 well on Instagram.

Former Patriots wide receiver (and noted Brady supporter) Antonio Brown also chimed in with the "GOAT" emoji, while big names from across the sports world -- Kevin Durant, David Beckham and Deion Sanders, to name a few -- also commented on Brady's Instagram post.

That's former Patriots teammates Demaryius Thomas, Rob Ninkovich, Lonie Paxton and Stevan Ridley showing Brady love, in addition to good friend Mark Wahlberg.

On Twitter, ex-Patriots cornerback Darrelle Revis gave Brady some pretty high praise:

Former Patriots QB and 98.5 The Sports Hub co-host Scott Zolak sent Brady his regards, as well, drawing a response from the GOAT:

Not every current or former Patriot took Brady's departure in stride, however. Here's Patriots cornerback Jonathan Jones:


Patriots fans probably agree with you, Jonathan.

As for where Brady will play next? Kansas City Chiefs safety Tyrann Mathieu has a theory.

There figures to be plenty more reaction to this massive story -- Brady hasn't even revealed where he's playing yet -- so stay tuned for more.