Mikey Welsh, the former bass player for Weezer, was found dead in a Chicago hotel room this weekend.

Chicago police spokeswoman Laura Kubiak told MSNBC that concerned staff at Raffaello Hotel went to check on Welsh when he missed the 1 p.m. checkout time on Saturday. When staff entered the room, they found Welsh unconscious and not breathing.

It is unclear how long he had been dead when he was found, but police do not suspect foul play.

Welsh had planned to attend Weezer's Sunday performance at Riot Fest in Chicago, and commented on his Facebook page that he was excited to see the boys, hang out, and have some fun, according to MSNBC.

The Burlington, Vt.,native was the bassist for Weezer from 1998-2001, during a time when the band was extremely popular. He left Weezer after suffering a nervous breakdown (which he publicly acknowledged) and returned to Burlington to focus on painting, He was considered a very successful painter by those who knew his work.

The Boston Globe described Welsh's art as manic, edgy, and masculine...Welsh handles his brush confidently, and his paintings read as if he sliced open a metaphorical vein and poured blood and soul onto the canvas.

Weezer webmaster Karl Koch posted an announcement of Welsh's death on Weezer's official Web site.

It saddens me and the guys in Weezer so much to say that our beautiful, creative, hilarious and sweet friend Mikey Welsh has passed away at the very young age of 40, he wrote. A unique talent, a deeply loving friend and father, and a great artist is gone, but we will never forget him. His chapter in the weezer story ('98 - '01) was vital, essential, wild, and amazing.

We will miss him terribly. Our deepest heartfelt condolences go out to his family and friends. The world has lost a truly one of a kind guy.