At first I thought my rotor was warped
 

Was racing a cobalt SS the other day was doing good neck n neck when traffic was coming up so decided to slow down i gently steeped on my breaks and the right side close to the wheel started to thump like as if it was warped rotors but my brake peddle was not pulsing like its supposed to do when they are. I was hitting 135 when this happened and now when I come to a stop that area pops. I will check it out tomorrow I would just like to know your guys opinion thanks

The caliper might be bad and is closing more then the others

ya a friend told me the same thing thanks man ill try and shed some light on it tomorrow