Could he sue us? Employee was fired after he injured himself on the job

Q. A replacement line supervisor directed an employee in our plant to use a machine he wasn’t trained to operate. The employee was injured when he stuck his hand into the machine to clear a jam. While the employee was recuperating in the hospital, the plant supervisor fired him for operating machinery he hadn’t been trained on. Does the employee have a right to sue us if the line supervisor ordered him to do this job?