Cut 2 pounds pork loin into 1-inch cubes, trimming off any large pieces of fat, and place into a 6 to 8 quart slow cooker.
Peel 2 medium russet potatoes and cut into 1-inch pieces. Dice 3 medium carrots, 1 medium yellow onion, and 1 medium tomato and them all to the slow cooker with the pork along with 2 teaspoons minced garlic.
Season with 1 1/2 teaspoons salt, 1 teaspoon dried oregano, 1 teaspoon ground cumin, 1/2 teaspoon black pepper, and 1/2 teaspoon cayenne. Add in the 1 bay leaf and pour in the 4 cups chicken broth over the meat and vegetables.
Cover and let cook on low for 6-8 hours or on high for 4-5 hours.
Remove the bay leaf and stir in 10 ounces diced green chiles right before serving.