Rock veteran Kenny Aronoff set to fill the post for upcoming tour in support of Adore.
Final sets unfolded with laughter and nostalgia, if not technical finesse.
The metal fans outnumbered the punks but both musical camps tolerated each other.
The nine-hour event featuring 33 bands, including Rancid and NOFX, was held in 115-degree heat.
Guitarist Mike McCready and drummer Matt Cameron star in fifth show of band's first North American tour in two years.
Ian MacKaye put rumors of the band's demise from the touring circuit to rest in Cincinnati.
Says he's already written most of the songs for the acoustic record.