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 Sham Charania and Alex Phillipou were first to break the news.

Brittney Griner will reportedly be leaving the Phoenix Mercury after 11 seasons for a new opportunity with the Dream, per ESPN’s Shams Charania. Griner’s free agency decision shakes up both the Mercury and Dream, as one team loses one of its best players and another gains an unexpected boost.

Star Brittney Griner has agreed to a one-year deal with the Atlanta Dream, sources told ESPN on Tuesday. Griner, who has spent her entire career in Phoenix after being drafted No. 1 overall in 2013, heads to Atlanta in one of the most stunning free agency signings in league history.