If you haven't heard Running Man, I'm sure there's a lot more that you haven't heard (that's available).
It's not recent at all, it is Maladroit Era/Early Album 5 Demo.
The first time I heard the song was in May or June of 2002, soon after Maladroit was released.
Weezer had recording sessions during May, June, and July where they recorded around 20-22 songs. One session included a 5th person on piano (can't remember his name).
If these songs would have only made it to an album....