Heat outdoor grill to medium.

Meanwhile, season both sides of chicken breast with salt and pepper.

Spray grates with cooking spray then add chicken. Using a pastry or marinade brush, brush the buffalo sauce on the chicken. Turn the chicken after about 5 minutes and brush the other side in sauce. Do this again until each side has been basted 2 or 3 times and chicken is done. Internal temp should read 165 for chicken.