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

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.

At the outset of free agency in the WNBA, the Atlanta Dream have reportedly pulled off a veritable blockbuster. Per Shams Charania and Alexa Philippou of ESPN, Atlanta has landed 10-time WNBA All-Star and two-time WNBA Defensive Player of the Year Brittney Griner on a one-year free agent contract.

Brittney Griner’s time in Phoenix is over. The 10-time WNBA All-Star struck a one-year deal to join the Atlanta Dream in free agency Tuesday night, according to ESPN’s Shams Charania and Alexa Philippou. Specifics of the deal are not yet known. It will be made official after Saturday, when contracts across the league are allowed to be signed.

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

Brittney Griner is leaving the Valley for Atlanta. After 11 seasons entirely played with the Phoenix Mercury, the 10-time All-Star center Griner has agreed to join the Atlanta Dream in free agency. ESPN's Shams Charania and Alex Phillipou were first to break the news.

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.

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.

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.

Brittney Griner's time with the Phoenix Mercury has come to an end. After 11 seasons in Phoenix, Griner is departing in free agency. Per ESPN's Shams

Landing Brittney Griner was a big swing for the franchise, which was was “pounding the pavement" to get better in free agency.”