Noisy Brake Pedal

I have a 2012 DCSB TRD Sport with 4000 miles, and tonight I was backing up (and had the radio turned off), and noticed that when I applied the brakes and released them I heard a rubbing noise. It also does this when moving forward as well. I can also feel it in the pedal, but the brakes work like they are supposed to. It sounds as if something needs grease. I never noticed this before tonight. I do not know if it was doing it since I purchased the truck, and never noticed it because I have never had the radio turned down while driving or if it just started. Wondering if any other 2012's have this problem? Guess I will have the Stealership check it out, or just turn up the radio when driving.

 

White Lithium Grease on the pivot point.