Britt just announced that this concert is Canceled. You can see the full explanation here: Britt website.
“Due to a sudden and unforeseen family emergency, Jason Bonham will be stepping away from his drum kit for the next few weeks. This will mean Jason will be missing the remaining US dates with Sammy Hagar as well as having to cancel his upcoming JBLZE appearances in September. Jason and his family ask for privacy during this time. We apologize for any inconvenience caused.”