Chris Cade, who was found unconscious Wednesday near Tully Park in Meridian, was released from Saint Alphonsus Regional Medical Center on Sunday, according to a fire department spokesman.
Investigators say the 46-year-old Nampa fire captain was one of six people assaulted in a violent, drug-fueled rampage by Sean Daniel Carnell, a 23-year-old Meridian man.
Cade's injuries were severe, including a broken rib, broken collar bone and fractured scapula.
"They were able to remove the chest tube, and his collapsed lung appears to be functioning as normal," Nampa Fire spokesman Doug Strosnider said in the Sunday release.
Surgeons are waiting for the swelling in Cade's face to subside so they can determine where plates and screws will be needed. There was also significant damage to his mouth and teeth.
Construction worker Mike Rice also was hospitalized Wednesday. Rice was struck in the face and back with a shovel, police said. He was listed in fair condition Friday at Saint Alphonsus Regional Medical Center.
Police suspect that Carnell was under the influence of drugs; blood was drawn for testing.
Carnell is charged with four counts of aggravated and misdemeanor battery, assault, burglary, second-degree kidnapping, cruelty to an animal, petit theft and malicious injury to property. He is being held at the Ada County Jail in lieu of $1 million bail.