Mike Porcaro, bass player for Toto, passed away on Sunday following a struggle with ALS, otherwise known as Lou Gehrig's disease. He was 59.

His brother, Steve Porcaro, who plays keys in the band, announced the sad news on Facebook.

"Our brother Mike passed away peacefully in his sleep at 12:04 AM last night at home surrounded by his family.

Rest in peace, my brother."

According to CNN, Porcaro noticed a loss of feeling in his fingers and hands about 10 years ago.

He was diagnosed with ALS in 2006.

Toto vocalist and guitarist Steve Lukather tweeted his condolences.

"My brother Mike Porcaro is now now at peace. I will miss him more than I could ever put into words. My deepest love to the family. God Bless."