You might notice from the chart that the Royals are old and terrible at baseball.
If you're not familiar with wOBA--I consider it the ultimate measure of a hitter. Here's my brief, somewhat simplified understanding of it: First, batting average and slugging are both flawed, for one because they completely exclude walks. Pure on base percentage (or average) is much more useful than AVG or SLG, but is still flawed because different events, such as a walk or home run, are valued the same. OPS (OBP+SLG) is maybe a little better yet, but still retains the flaws of OBP and SLG and probably overvalues SLG in relation to OBP.
WOBA solves all of these problems by adding "weights" to the different outcomes of a plate appearance based on how many runs the average walk, single, double, triple, and home run create. Tom Tango, wOBA mastermind, came up with these values for the different outcomes:
Then to come up with a number that would be familiar, wOBA is scaled to look like OBP numbers that baseball nerds are familiar with. In Tango's words, "an average hitter is around 0.340 or so, a great hitter is 0.400 or higher, and a poor hitter would be under 0.300." You really don't have to fully understand all the specifics behind the number; just know that it is awesome. You can find wOBA stats at FanGraphs.
HR 1.70, 3B 1.37, 2B 1.08, 1B 0.77, non-intentional BB 0.62