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

NEW YORK, NEW YORK – SEPTEMBER 24: Rhyne Howard #10 of the Atlanta Dream dribbles during the second half against the New York Liberty in Game Two of Round One of the WNBA Playoffs at Barclays Center on September 24, 2024 in the Brooklyn borough of New York City. The Liberty won 91-82. (Photo by Sarah Stier/Getty Images)

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

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 is testing the free agent market for the first time in her career. The All-Star center is taking meetings starting Tuesday with multiple teams, according to her agent. WNBA executives were in Miami for the opening of Unrivaled to talk with Griner and other free agents.

Phoenix Mercury center Brittney Griner is testing the free agency market for the first time and has left people speculating on social media.

Ten-time WNBA All-Star Brittney Griner has confirmed in an Instagram post that she is joining the Atlanta Dream as a free agent. Earlier Tuesday, both ESPN and the Associated Press reported Griner agreed to a one-year deal with the Dream, citing undisclosed sources. Free-agent contracts cannot be signed until Saturday however.

The 3-on-3 league features an 8-week season and tips off Friday in Miami, featuring top talent from the WNBA like Brittney Griner and Angel Reese. (AP video: Brittany Peterson) Phantom’s Brittney Griner, practices defensive plays, Thursday, Jan. 16 ...

Phantom won its first game in Unrivaled on Friday thanks to Brittney Griner's heroics, although the WNBA All-Star suffered several injury problems during the victory

There's a possibility that Brittney Griner won't be in a Phoenix Mercury uniform next season. The All-Star Griner is testing the WNBA free agency market for the first time, the Associated Press reported.

Photo: Jordan Johnson/NBAE via Getty Images The intrigue: From Sabrina Ionescu to Angel Reese and Brittney Griner, almost every big name in women's basketball is playing in the new league. The notable missing name is Caitlin Clark, arguably the sport's ...