Brittney Griner is officially moving on from the Phoenix Mercury. Griner is signing a free-agent contract with the Atlanta Dream when free agency opens Sunday, ESPN's Shams Charania and Alexa Phillipou first reported.

The WNBA landscape was shaken up Tuesday. First, the Phoenix Mercury traded for Connecticut Sun star Alyssa Thomas. Then, longtime Mercury star center Brittney Griner decided to leave Phoenix after 11 seasons to join the Atlanta Dream.

Long-time Phoenix Mercury star will start a new chapter of her career in the WNBA with another team after a wild free agency decision.

Amid news of her move, Griner took to Instagram to make her first post about her free agency decision. She shared a clip of herself riding a boat alongside her new teammates, Jordin Canada, Rhyne Howard and Allisha Gray.

Griner was the No. 1 pick in the 2013 WNBA draft. In her 11 seasons in Phoenix, Griner averaged 17.7 points, 7.4 rebounds and 2.6 blocks in 30.4 minutes per game. She was named to 10 All-Star games, won two Defensive Player of the Year awards and was a two-time scoring champion.

Brittney Griner has agreed to a one-year deal with the Atlanta Dream, ending her tenure with the Phoenix Mercury after 11 seasons, ESPN reported.

Griner is the latest big name to move during the WNBA’s offseason, as she’ll leave the Mercury and head to Atlanta.

According to ESPN’s Shams Charania and Alexa Philippou, 10-time WNBA All-Star Brittney Griner has agreed to a one-year deal with the Atlanta Dream. The 6-foot-9 center has spent her entire 11-season career with the Mercury. For her career, she has averaged 17.7 points, 7.4 rebounds and 2.6 blocks per game.

Griner has spent her entire career with the Mercury, since her start in the WNBA in 2013. She is one of several WNBA free agents — including another Phoenix standout, Diana Taur

WNBA free agency has seen another big move, and it involves center Brittney Griner. The 11-year veteran, who has played her entire professional career with the Phoenix Mercury, is on the move.

After 11 seasons in Phoenix, 10-time WNBA All-Star Brittney Griner has agreed to a deal with the Atlanta Dream, sources tell me and @alexaphilippou. Griner spent her entire career with Mercury and now heads to Atlanta in one of most stunning free agency moves in league history. pic.twitter.com/NfdAuYOAVs