Preheat oven to 350º.
Heat olive oil in a large Dutch oven over medium-high heat. Sprinkle chuck roast with salt and pepper. Add roast to pan; cook 5 minutes, turning to brown on all sides. Remove roast from pan. Add onion to pan; sauté 8 minutes or until tender.
Return browned roast to pan. Add the red wine, thyme sprigs, chopped garlic, beef broth, and bay leaf to pan; bring to a simmer. Cover pan and bake at 350° for 1 1/2 hours or until the roast is almost tender.
Add carrots and potatoes to pan. Cover and bake an additional 1 hour or until vegetables are tender. Remove thyme sprigs and bay leaf from pan; discard. Shred meat with 2 forks. Serve roast with vegetable mixture and cooking liquid. Garnish with thyme leaves, if desired.
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