After being diagnosed with Parkinsonism, Steuart Smith is retiring as lead guitarist for the Eagles. The 72-year-old musician, who has acted as the “Hotel California” band’s co-lead guitarist for almost 25 years alongside Joe Walsh,

The musician who has served alongside Joe Walsh for 24 years as the Eagles’ co-lead guitarist, Steuart Smith, has officially retired from the group, taking his leave midway through the group’s stint at Sphere in Las Vegas.

According to the Cleveland Clinic, Parkinsonism is an umbrella term that refers to several brain conditions — including Parkinson’s disease — that cause slowed movements, rigidity (stiffness) and tremors. Parkinson’s disease makes up about 80% of all Parkinsonism cases.