It does appear likely, however, that the decline in results — among participants and the majors’ other top-50 home-run hitters — is due to expected regression.

Following a strong start to the season stuffing the run, the Seattle Seahawks have taken a major step backward over the past three weeks, with the regression reaching a new low point surrendering ...

The output contains a ton of information but you only need to understand a few key data points to make sense of your regression. You need the Analysis Toolpak add-in to run regressions.