Tom Brady, the centerpiece of the New England Patriots’ championship dynasty over the past two decades, appears poised to leave the only football home he has ever had.

The 42-year-old six-time Super Bowl winner posted Tuesday on social media “my football journey will take place elsewhere.”

Read more: Tom Brady's Impact On New England Sports Can't Be Measured

The comments were the first to indicate the most-decorated player in NFL history would leave New England.

In a two-part message, Brady thanked the Patriots and the fans and said “FOREVER A PATRIOT.”

“I don't know what my football future holds, but it is time for me to open a new stage for my life and my career,” he wrote. “Although my football journey will take place elsewhere, I appreciate everything that we have achieved and am grateful for out incredible TEAM experiences.”

The one-year contract Brady signed before last season expires Wednesday afternoon, and his agent could negotiate a deal with another team on Tuesday, though it can't be official yet. He actually could still work out a new deal with New England, but his Instagram post suggests that won't happen.

A four-time Super Bowl Most Valuable Player and three-time league MVP, Brady has been the enduring face of the Patriots during a run that added another layer to Boston’s already rich sports history. Only Bill Russell, who won 11 NBA championship rings in the 1950s and 60s with the Celtics, has won more titles as a member of one of New England’s four major professional sports teams.

Brady would be the oldest starting quarterback in the league at 43 at the beginning of next season. He is also arguably coming off his worst non-injury season. He threw for 4,057 yards and 24 touchdowns in 2019, with eight interceptions. But he completed fewer than 56% of his passes six times in the final eight games of the year, including a season-ending loss to Miami that cost the Patriots a first-round playoff bye.

They lost at home to the Titans in the wild-card round, Brady’s earliest postseason exit in a decade — and likely his last game in a Patriots uniform.

Brady had a one-year contract for 2019 that paid him $23 million, placing him 10th among starting quarterbacks. It was the latest renegotiation by Brady to help give the Patriots salary cap flexibility to fill out the roster.

The chief decision maker in player personnel decisions, Patriots coach Bill Belichick hasn't been shy about moving on from players he felt were past their prime or seeking contracts that exceeded value in relation to their age. Belichick has severed ties with players much younger than Brady during his time in New England.

But Belichick also acknowledged in January that Brady was a special case.

“Everybody's situation is different," Belichick said. "Certainly, Tom is an iconic figure in this organization. And nobody respects Tom more than I do.”