Ben Warren, played by Jason George, left Grey's Anatomy in season 14 to pursue a career as a firefighter. He joined Station 19, a spin-off series set in the same universe as Grey's Anatomy.
This decision came after Warren felt a calling to serve his community in a different capacity. He had been working as a cardiothoracic surgeon at Grey Sloan Memorial Hospital, but he felt unfulfilled and wanted to make a difference in a more direct way.
Warren's departure was a significant event for Grey's Anatomy, as he was a beloved character who had been a part of the show since season 6. His exit allowed for the introduction of new characters and storylines, and it also provided a bridge to the spin-off series Station 19.
Warren's decision to leave Grey's Anatomy was a testament to his character's growth and development. He was a dedicated surgeon who was always willing to help others, but he ultimately realized that his true calling lay elsewhere.