"Excited for my next chapter in New England! I will give this organization everything I have, thank you for believing in me," Smith-Schuster wrote.
The two sides are reported to have reached an agreement on a three-year, $33 million deal, which includes $22.5 million earned over the first two seasons of the contract, sources with knowledge of the situation told ESPN's Adam Schefter.
Smith-Schuster spent the 2022 season with the Kansas City Chiefs, having a bounce back season and playing a crucial role in their Super Bowl LVII victory against the Philadelphia Eagles last month, which included recording seven receptions for 53 yards, as well as drawing a flag on cornerback James Bradberry that allowed Kansas City to continue its drive, run down the clock and set up a game-winning field goal by Harrison Butker.
"Thank you to Kansas City for the giving me the opportunity to come in and contribute to a Super Bowl, the most unforgettable experience of my life. I will always love my teammates, the coaching staff, and the fans for being so great to me," Smith-Schuster tweeted on Wednesday.
The former Pro Bowler signed a one-year, $10 million deal with the Chiefs last offseason after spending his entire career with the Pittsburgh Steelers.