On April 21, 2020, the Patriots, which still held Gronkowski's rights, traded him to the Tampa Bay Buccaneers along with a seventh-round pick in exchange for a compensatory fourth round pick in the 2020 NFL Draft.
The trade reunited him with his former Patriots quarterback Tom Brady, who had signed with the Buccaneers a month prior.
Head coach Bruce Arians stated that it was Brady himself who was adamant for the team to trade for Gronkowski.
Head coach Bruce Arians stated that it was Brady himself who was adamant for the team to trade for Gronkowski.
On October 18, 2020, Gronkowski caught five passes for 78 yards and his first touchdown with the Buccaneers in a 38–10 victory over the Green Bay Packers.
It was Gronkowski's first touchdown catch since December 9, 2018, against the Miami Dolphins.
In Week 12 against the Kansas City Chiefs, Gronkowski recorded six catches for 106 yards during the 27–24 loss.
In Week 16 against the Detroit Lions, Gronkowski recorded two catches for 58 yards that both resulted in touchdowns during the 47–7 win.
Overall, he finished with 45 receptions for 623 receiving yards and seven receiving touchdowns.
Gronkowski's 29-yard catch towards the end of the fourth quarter of the NFC Championship Game set up the critical lead-extending field goal for Ryan Succop, with the Buccaneers winning 31–26 over the Packers.
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