Phong was best known for training Thai legend Khaosai Galaxy [เขาทราย แกแล็คซี่], among others, and helping Khaosai become one of the most notable Thai's in Western boxing history, and one of the scariest Super Flyweights ever.
From what we understand Phong passed away in his late 70's following ill health and age related illnesses. His funeral will take place at the end of this month.
The health issues that plagued his later years eventually forced him to withdraw from the boxing circles that he had made his name in, though he continued to be very highly regarded bu those in boxing in Thailand with many looking towards his methods for their own training. Sadly it seems some of his tricks will have been lost with his passing however his legacy lives on with with many of his students and followers now integral to the Thai scene.