Indianapolis police said Paul Perry, 50, told officers he arrived home Monday to find a man cooking a meal in his kitchen, The Indianapolis Star reported Tuesday.
Perry said he recognized the man as his landlord's 30-year-old son, whose name was not released.
"They began arguing verbally," the police report said. "[The landlord's son told] Mr. Perry that he was lazy and had not kept the house clean."
Perry said the other man threatened him before retrieving a tire iron from his car and striking Perry on his left bicep, elbow and thumb.
Perry was treated for his injuries.
Police are investigating the incident, the report said.