This is not an official Pearl Jam font- I found it while reading an article about them on rollingstone.com.

Parkinson Black  Suggested by jerseygirl 

Before anything else, there is no such thing as an official Pearl Jam font, that is, a font designed exclusively for Pearl Jam and to be used by them only.

I know that there isn't an official font. I was mentioning this before someone said "it's a copyrighted official exclusive blah blah font."

Thanks for the help.