The Boston Celtics took another step in their veteran-oriented offseason overhaul Saturday by agreeing to preliminary terms on a two-year contract with the free agent forward.
"He was a free agent," team spokesman Jeff Twiss said Sunday.
"He was available to be signed and he decided to sign with us."
Posey will make between $7 and $7.5 million over the course of the deal, although the second season is a player option. The Celtics used most of the remainder of their mid-level exception to sign Posey, who spent the past two seasons with the Miami Heat.
The nine-year veteran will be joining his fifth NBA team, having spent four seasons in Denver, one in Houston, two in Memphis and two in Miami. The defensive specialist is the third significant role player lost by the Heat to free agency this summer, joining Jason Kapono, who signed with Toronto, and Eddie Jones, who agreed to a contract with Dallas.
Chris Sheridan covers the NBA for ESPN Insider. The Associated Press contributed to this report.