How can I create a multi data line graph for Baseball stats?

I took a run at this but, TBH, Baseball isn't my sport, so I wasn't sure what you're aiming for here.

I recreated your table, but am kind of missing what you're looking for here. maybe if I understood baseball stats better it would be clearer, otherwise I'm going to need some help :)

What data, specifically, are you looking to chart. There seems to be inconsistency in your ask, unless you're looking for multiple graphs?

For example, you mention a chart to compare the average for each batter. I was able to get this graph by simply selecting the various Average columns, clicking the Chart -> Line option and applying a few formatting options:

However, I have no idea if that's what you're looking for.

Similarly, I was able to select the stats for an individual player and create the following graph (with a little tweaking):

But, again, I don't know if that's useful to you.

If I'm wrong, can you post an example of what data you want/expect to see in a chart (or charts)? Or maybe someone else with a better understanding of baseball can get closer.