R.I.P.: Mike Porcaro, Bassist With Toto

Mike Porcaro

For over two decades, bassist Mike Porcaro was a rock star with the band Toto, playing venues around the world.

Now, the music world is mourning the death of Porcaro, who died after a battle with Lou Gehrig's disease, also known as amyotrophic lateral sclerosis or ALS. He was 59, according to CNN.

"Our brother Mike passed away peacefully in his sleep at 12:04 AM last night at home surrounded by his family," Porcaro's brother Steve, the band's keyboardist, posted on Facebook on Sunday. "Rest in peace, my brother,"

About 10 years ago, Porcaro started noticing weakness in his fingers and hands. He was diagnosed with the disease in 2006.

Former members of his band -- known for hits such as "Africa" and "Rosanna" -- rallied to help. They reunited for a brief European tour in 2010 in support of Porcaro.

Toto vocalist and guitarist Steve Lukather also called Porcaro a brother.