Prep: In a small bowl, whisk together lime juice, Worcestershire sauce, oil, lemon pepper and garlic powder.
Marinate: Place chicken in a gallon Ziploc bag or large glass bowl. Pour marinade over chicken breasts and let sit for a minimum of 30 minutes.
Grill: Heat grill to medium-high heat. Cook chicken for 5-6 minutes per side or until internal temperature reaches 165F. Cooking time will depend on thickness of chicken. Remove chicken from grill and let sit 5 minutes before slicing.