Bassist Mikey Welsh, best known for his time spent playing with Weezer from 1998-2001, passed away on Saturday from causes that are yet to be determined. He was 40.
Welsh was recruited to join Weezer when bassist Matt Sharp left the band to pursue his own project, the Rentals. He performed with the band when they re-emerged in 2000, touring and playing on The Green Album. That record is considered a turning point for the band and was received somewhat controversially among critics; clocking in at a mere 28 minutes total, it's a pure pop album that foreshadows the band's future as overtly radio-friendly hit-makers.
Welsh left the group in 2001 after he suffered a mental breakdown, which was later revealed to have been brought on by drug use and the stress of touring. "A lifetime of doing drugs and being undiagnosed as having disorder, post-traumatic stress disorder, and borderline personality disorder finally caught up with me when I was 30 years old," Welsh said in a 2007 interview. "It ended with a severe suicide attempt (an overdose). I was found and rushed to the hospital where I had come to within minutes of my heart completely stopping. I was in a coma for a few days, and woke up in a lockdown psychiatric ward."
Since leaving the band, Welsh primarily focused on his career as an artist, though he did reappear this summer to perform with Weezer at a show for their show in Jones Beach, New York with the Flaming Lips.
Eerily, Welsh appears to have predicted his own death on his Twitter account; just two weeks ago, he wrote that he had a dream about his death and that he was concerned about getting his will in order.