Gentry, 65, has been a head or assistant coach in the NBA since 1989. He's led the Miami Heat, Detroit Pistons, Los Angeles Clippers, Phoenix Suns and New Orleans Pelicans as their head coach. Gentry also won an NBA title with the 2014-15 Golden State Warriors as an associate head coach on Steve Kerr's staff.
The Pels parted ways with Gentry in August after he served as their head coach from 2015-16 through this season.
The 76ers decided to move in a different direction after parting ways with head coach Brett Brown following seven seasons.
Philadelphia agreed to a deal with Rivers, who left the Los Angeles Clippers this week after seven years with the team, on Thursday, per Wojnarowski.
Gentry served on Rivers' 2013-14 Clippers staff as an associate head coach.
As for the Kings, the team needs a lead assistant for Walton after the departure of Igor Kokoskov, who now leads Fenerbahce of the Turkish Basketball Super League as their head coach.
Walton was on Kerr's staff as an assistant during Gentry's one season in the Bay Area.
Ultimately, Gentry should not be without a coaching job for long given reported interest from at least two teams. The 2020-21 season would mark Gentry's 32nd year as an NBA coach.