Lonestar_Ag09 said:
You can't regress up…
In this case, you can. In statistics, the regression refers to the deviation from the mean getting smaller. In other words, if you have observed an accurate and precise mean, then the further an observed data point is from that mean, the more likely the next one will be closer to the mean. Deviation is shrinking and 'regressing to the mean'.
A more accurate term is reversion to the mean, but you can regress to the mean whether you are above it or below it.
Most sports fans misapply the principle though, because we hardly ever have an accurate and precise mean from which to base these statements because variables change every game and every season.