If you care about your stats you should practice before you play ranked rounds.If not,like Snaike said,fire it up,I do,uh, I mean I did.It's taking a while to get my stats up above 90%but I'm getting there.
All stats are recorded for ever in ranked rounds.Lowering your average should be fairly easy,all you have to do is shoot 149.I'm almost positive you can do that.lol..
Good luck and Keep Swinging