Place the 6 skinless chicken breasts in the slow cooker in a single layer.
Pour the entire bottle of Sweet Baby Ray's BBQ sauce over the chicken.
Add 3 tablespoons Worcestershire sauce, 1 tablespoon Sriracha, and 1/4 teaspoon red pepper flakes on top of the chicken.
Cover and cook on high for 3 hours, until the chicken is cooked through and tender.
Use two forks to shred the chicken directly in the slow cooker.
Stir the shredded chicken into the sauce, then cover and cook on low for 1 hour to meld flavors.
Serve the shredded BBQ chicken with rolls, rice, or prepared coleslaw as desired.