Eddie Diaz and Evan Buckley in the spring premiere of 9-1-1, after the crazy season 5A cliffhanger.MORE: 9-1-1 star Rockmond Dunbar exits show over vaccination protocolsFans saw Eddie, played by Ryan Guzman, decide to leave Firehouse 118 after realizing that he needed to remove himself from danger for the sake of his young son Christopher's mental health.WATCH: 9-1-1: Eddie Diaz leave Firehouse 118But that decision affects more than just Eddie, and Oliver shared that his character Buck will