Sinclair Broadcast’s struggling Diamond Sports appoints CEO

A week after writing off an additional $1 billion of its value, the Sinclair Broadcast Group subsidiary that owns regional sports networks appointed a new CEO. The subsidiary, Diamond Sports Group, said Monday that former NBC Sports Group executive David Preschlack will lead Diamond, which owns Bally Sports Regional Sports Networks. Preschlack was appointed by Diamond’s board of managers, on which he has served since May.