Cel Revuelta was in the final incarnation of Black Flag during the band's original run and played with the band on their final 1986 tour. Unfortunately, it has just come to light that in July 2016, he was diagnosed with terminal brain cancer. Since then, he has had a brain tumor removed and undergone chemo and radiation treatments. Revuelta is still currently battling the disease and is currently out of work. You can find updates on his condition here.