Al Horford (right) has appeared in 28 games this season and is averaging 14.2 points and 6.7 rebounds per night. Alonzo Adams-USA TODAY Sports

With the Thunder being unable to trade Al Horford before Thursday’s deadline, it appears the veteran big man has played his final game for the franchise, according to Adrian Wojnarowski of ESPN.

Horford, 34, won’t play any more this season as Oklahoma City focuses on developing its young talent, sources tell Wojnarowski. Horford will train at the Thunder's facility and will remain around his teammates, but won’t be active for games.

Horford has been a positive influence on younger players since being acquired from the Sixers in an offseason deal, and the organization wants to keep him as a locker-room presence, Woj adds. General manager Sam Presti has promised to work with Horford and his agent, Jason Glushon, to trade him after the season ends. Horford still has two years and $53 million left on his contract.

The Thunder had been planning to eventually make this move with Horford, a source tells Wojnarowski, but the recent loss of star guard Shai Gilgeous-Alexander, who is expected to miss significant time with plantar fasciitis, sped up the timeline.

Horford has appeared in 28 games this season and is averaging 14.2 points and 6.7 rebounds per night.

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