Hartenstein is the son of Florian Hartenstein, a German-American basketball coach who played professionally in Germany. Isaiah Hartenstein grew up in Germany and played for QTSV Quakenbrück.

It's not often that NBA players get involved in the ownership of professional basketball teams while in their playing days, but that isn't the case for Oklahoma City Thunder center Isaiah Hartenstein.

Hartenstein said he remembered growing up watching the old Thunder squads when he was in Germany headlined by the trio of Kevin Durant, Russell Westbrook and James Harden. "OKC was always a team I ...