It's semi-confirmed. Either way, RIP man. Spinnin' some Green Albums and some SS2K tonight for sure. Dude had some demons for sure, hope they didn't drag him down.
Confirmed by Patricks Twitter and Weezers aswell.
Huge loss, I've known Mikey casually for the last two years or so and he's really gotten back on his feet and living a happy, healthy life after his Weezer-era breakdown.
Rest In Peace, Mikey.