The drummer of the band  What Is This? Is best known as the founding drummer of what band ?
What Is This?:  It was formed by guitarist Hillel Slovak, drummer Jack Irons, vocalist Alain Johannes, and bassist Todd Strassman. Jack Irons:  He is best known as the founding drummer of the American rock band Red Hot Chili Peppers, and as a former member of Pearl Jam, with whom he recorded two studio albums.
i don't know