I don't play so often anymore, so...

My job keeps me from playing as much as I used to. In light of that fact, I'd kind of like my mastery levels in champions to degrade or reset or something. I don't want to give my teammates the idea I'm going to rock this Nunu game and have them discover, in game, that I don't know what the good masteries are, or that my consume + smite timing has gotten rusty.