Thunder assistant coach Monty Williams will not return to the team.
Thunder head coach Billy Donovan made the announcement Wednesday morning.
Williams left the team after his wife, Ingrid, was killed in a car crash. On Feb. 9, an oncoming car crossed the center line and hit Ingrid Williams' SUV near downtown Oklahoma City. She died the next day.
Williams was in his first season with the Thunder. He was head coach of the New Orleans Pelicans the previous season and led them to the playoffs.
Donovan said he would talk to his current assistants to help figure out how to go forward.