That's not the photo I'm referring too. There is another photo in his book with a group of players and Efren is one of them. I just picked up my copy of the book. On the same page as that photo are two other smaller photos. A very young Efren is in one, wearing a white Tee-shirt with his hands on his beltline, standing next to the table. The guy playing was the number one player (his name escapes me at the moment), who was killed a few years later after being involved in a dump.
There are many great photos of old time players like Don Willis, Shorty, Jersey Red and Gene Nagy, and the book is a must have for billiard fans. Some great stories by Grissim in there. I recommend it highly.