Funny, when they list the actors, they don't list him, but, if you scroll down to read about the pic, it does list Jamison Selby.
And, if you really want to see an example of bad info circulating online, here's how some online retailers have summarized Headless Body in Topless Bar, a movie with an ensemble cast that includes David Selby:"Jeff has a problem: his best friend Carl has spontaneously decapitated. So what does Joe do but drag his headless friend to their favorite topless bar, sets him in a corner booth, and watch dancing strippers."