WARNING - Mini stat lesson below:
Many people associate the word 'regression' with negative direction. The reality is that regression can be negative or positive (bad or good), which is why I often use the term 'positive regression', to avoid such confusion, even though the word 'regression' by itself is sufficient.
Regression, or regression to the mean, basically is the tendency of data to be closer to the average after an above or below average measurement. So, if a player has a career type year, he is likely to drop off the following year, or regress. Likewise, if a player has a sub-par year, he is likely to have a better year the following year, or regress.
I think several of our hitters will regress this season, meaning that they will improve over what they did last season.