Ryan Sheckler

Possible stalkers, take heed -- Ryan Sheckler's teenage brother will open up a can of whoop ass if you get too close to his star bro. Law enforcement sources tell TMZ Shane Sheckler got into an altercation with a middle-aged guy who kept showing up at the family home. We're told the guy was turned…

Pro skater and MTV reality star Ryan Sheckler just found out he was missing $365,000 -- and cops think he may have been stabbed in the back big time. Cops just arrested Matthew Mercuro today -- who was the Chief Financial Officer for Ryan's two companies -- and charged him with embezzling more…