I’ve noticed several baseball analysts use a slash line when noting a players’ performance. It’s not as common on TV so I just recently learned it. An example would be in 2009 Michael Young had a slash line of .322/.374/.518.
The percentages are: Average/On-Base Percentage/Slugging Percentage
AVG = H/AB.
Most people know that a good average is usually around .300. Ted Williams had a good way of putting it: “Baseball is the only field of endeavor where a man can succeed three times out of ten and be considered a good performer.”
OBP = H + BB + HBP/AB + BB + HBP + SF
This measures how often the batter reaches base. A good OBP is .370.
SLG = (1B) + (2 x 2B) + (3 x 3B) + (4 x 4B)/AB
This measures the power of a hitter. A good slugging percentage is .500 or higher.