The longtime Phoenix Mercury star is joining the Atlanta Dream, and discussed her decision in an Unrivaled social media clip.

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

WNBA star Brittney Griner confirmed reports that she will sign with the Atlanta Dream as a free agent. Griner posted a video on her social media accounts with Dream players Allisha Gray, Rhyne Howard and Jordin Canada.

In a move that shakes up the WNBA, Brittney Griner is joining the Atlanta Dream in free agency after a decorated 11-season stint with the Phoenix Mercury.

After 11 seasons with the Phoenix Mercury, Brittney Griner left in free agency to join the Atlanta Dream. New teammate Allisha Gray reacted to the news of Griner's decision which comes on the heels of Mercury's acquisition of Alyssa Thomas from the Connecticut Sun.

In Phoenix, the center lived up to her draft potential, won a title and was a fan favorite. What lies ahead in Atlanta?

Griner entered the offseason as the second-longest tenured WNBA player with one team, having spent her entire career in Phoenix.

Brittney Griner made headlines on Tuesday after signing a contract with the Atlanta Dream, leaving the Phoenix Mercury after 11 seasons.

Brittney Griner will leave a legendary legacy with the Mercury after playing 10 seasons with them, before signing with the Dream.

Brittney Griner is officially headed to the Atlanta Dream, ending her 11-season tenure with the Phoenix Mercury in one of the WNBA’s most significant free agency moves. The 10-time All-Star’s decision was announced Tuesday night.