The Rocker

I just watched The Rocker, the 2008 film starring Rainn Wilson (famous for playing Dwight Schrute on the American version of The Office).

It's about a guy who missed his big chance to play in a world-famous rock band, having been unceremoniously fired right before they hit the bigtime.

As he struggles to make his way in "real life" he finds himself sitting at a bus stop next to the guy pictured below. Get it? Scroll to the bottom of The Rocker's cast--can you spot a vaguely familiar name? In case you have no idea what the reference is, here is this guy's wikipedia page.

I thought Rainn Wilson played Arthur on 'Six Feet Under'.
Sure as hell looked like him.
Same name too.
Oh well, I've been wrong before...

I know who this person (don't want to give it away by saying the name) is, but I didn't know what he looked like as an older man with a mustache.

This is what he looked like when his band dumped him.

The wiki link in the original post pretty much gives it away already.