Hey Roy--I absolutely LOVED the Grassroots as a kid. While it is Rob Grill's autograph you have scanned and shown us here, the guy in the picture is Warren Entner, the other singer in the band. The guy on the right I believe was named Creed Bratton, and he played guitar I think (or maybe drums before Rick Coonce?) And all this falls into the category of "Useless Trivia"...!