In the bowl of a stand mixer or using a hand mixer, beat together the cream cheese with the crumbled feta cheese, shredded cheddar cheese, onion, garlic, Worcestershire sauce, salt and pepper. Scrape down the sides of the bowl halfway through mixing to make sure all the ingredients are well combined.
Pile the cheese mixture into the center of a large sheet of plastic wrap. Gather the wrap over top of the cheese, forming it into a ball and twist the top of the plastic wrap tight to close.
Allow the cheese ball to refrigerate for about 8 hours. You can wrap the plastic in foil and freeze the cheese ball for up to four weeks. Allow to thaw in the refrigerator before coating.
Unwrap the cheese ball from the plastic wrap. Use you hands to gently smooth the cheese into a ball shape, like you would a snow ball. Spread the chopped parsley and pomegranate seeds onto a clean sheet pan that is lined with a silicone baking mat or parchment paper. Roll the cheese ball until it is completely coated in the fresh herbs and pomegranate seeds. Serve with crackers.