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

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.

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 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.