(Note: This story has been updated with the end of testing and the USBC report.) Monday, Feb. 17, 2020 is a day that almost certainly will be referenced and recalled for a long time in bowling. How important the day is in bowling history depends on how USBC — and PBA to lesser degree — react to the failure of 2 PURPLE HAMMER balls and the near-failure of dozens from all companies to meet the minimum hardness standard. At USBC Executive Director Chad Murphy’s “Town...