What’s Happening Leigh Diffey will make his long-awaited return to the NASCAR booth in a highly anticipated move. Diffey, who has not been in the booth for a NASCAR race in seven years, will replace Rick Allen, the longtime voice of NASCAR on NBC, beginning at the Aug. 24 Coke Zero Sugar 400 at Daytona. … Continue reading Leigh Diffey Officially Returning to NASCAR Broadcast Booth