01 - Pat beef chuck roast dry with paper towels. Season evenly with salt and black pepper.
02 - Heat olive oil in a large skillet over medium-high heat. Sear beef roast on all sides until browned, about 2 to 3 minutes per side.
03 - Place carrots, potatoes, celery, and sliced onion in the bottom of the slow cooker.
04 - Set seared beef roast atop the vegetables. Sprinkle minced garlic, dried thyme, and rosemary over the beef, then add bay leaves.
05 - Pour beef broth and Worcestershire sauce over the contents. Cover and cook on LOW for 8 hours, until beef is fork-tender and vegetables are cooked through.
06 - Remove bay leaves. Slice or shred beef and serve with vegetables and cooking juices.