“Chris” is how the escort in question has frequently introduced himself either in person (Hi, nice to meet you, I’m Chris”) or on the phone (“Hi, this is Chris, you texted me.”). I thought using that name was an easier construction than “I just saw latinomusclebull”, but I can certainly see why Walt asked the question.
“Scotty Marx” (pictured above) was the name he used when first doing porn. For some reason within the past couple of years he switched to his current screen name from TxMuscleStud.