The Eagles' co-lead guitarist since 2001, Steuart Smith, has retired midway through their Sphere stint, due to effects of Parkinson's disease.

The beloved rock band played at the Sphere without the band’s longtime guitarist Steuart Smith. The 72-year-old has left the group after recently being diagnosed with Parkinsonism, a general term for a group of neurological disorders that affect movement.

Veteran guitarist Steuart Smith, who's been touring with the Eagles for 24 years, revealed that his recent Parkinsonism diagnosis had a profound impact on his decision to retire