If You Aren't Taking A Representative Sample,

We Need To Stop, And Admit It: We Have A Prediction Problem. We Love To Predict Things—and We Aren’t Very Good At It.

There's Always The Risk That There Are Unknown Unknowns.

You Don't Want To Influence The Same System You Are Trying To Forecast.

The Key To Making A Good Forecast Is Not In Limiting Yourself To Quantitative Information.

Walk Rate Is Probably The Area In Which A Pitcher Has The Most Room To Improve, But A Rate That High Is Tough To Overcome.