Prepare the marinade by whisking together olive oil, soy sauce, Worcestershire sauce, red wine vinegar, lemon juice, Dijon mustard, parsley, black pepper, and minced garlic in a mixing bowl.
Place chicken breasts in a gallon-sized resealable plastic bag or shallow dish and pour the marinade over the chicken.
Seal the bag or cover the dish and refrigerate for at least 2 hours, or up to 8 hours for maximum flavor.
Preheat your grill to medium-high heat, around 400°F
Remove the chicken from the marinade, allowing any excess to drip off, and discard the marinade.
Place the chicken breasts on the grill and cook for 6-8 minutes per side, or until the internal temperature reaches 165°F
Remove the chicken from the grill and let it rest for 5-10 minutes before slicing and serving.
