Dry the beef chuck roast with paper towels, then coat it evenly with olive oil, salt, black pepper, garlic powder, and onion powder.
Heat a skillet to medium-high and brown the roast on every side, approximately 3-4 minutes each side, for extra flavor – this step can be omitted for convenience.
Place the seared or raw beef into your Crockpot.
Combine beef broth, Worcestershire sauce, and soy sauce in a bowl, then pour this liquid mixture over the roast inside the Crockpot.
Cover and cook the beef on low heat for about 8 hours, until it becomes tender enough to shred easily.
Take the roast out and let it rest for 5 minutes before shredding it into pieces with two forks.
Return the shredded beef to the Crockpot to absorb the juices for a few minutes while preparing the rolls.
Slice the hoagie rolls open and, if you wish, broil the provolone cheese on them for 1-2 minutes until melted.
Assemble the sandwiches by filling the rolls with the shredded beef, and serve with a side bowl of the flavorful au jus for dipping. Garnish with parsley as preferred.