SLG
From SoSH
Slugging percentage is a statistic used in baseball to calculate a hitters power. A player's TB (Total Bases) divided by the number of his at-bats. (SLG = TB/AB)
According to FanGraphs, good SLG is greater than .500, average SLG is between .300 and .500, and bad SLG is less than .300. The league average is ~.400.

