No, he didn't leave. Yesterday, the band just said he was going to be part of a wedding, so he was gonna miss the first few dates. I thought the same, but they addressed it during their set. So yeah, he's still in the band, just not gonna be playing the first couple of shows.
Thank God! I was hoping it was not true.
This is what I had read before:
In June 2011, guitarist JD Perry left the band on amicable terms due to personal reasons. The band continued touring obligations on the Zumiez "couch tour" with Forever the Sickest Kids and I See Stars with a friend, Trevor Leonard playing on guitar.