The Panthers made room on the 80-man roster Saturday by waiving injured offensive lineman Steve Justice.
Already without linebacker Thomas Davis, who tore a knee ligament in June, the Panthers practiced Saturday morning without Jamar Williams (shoulder), Jordan Senn (shoulder) and Quinton Culberson (thigh).
Harris was the Bills' fifth-round pick in 2009 and played in 15 games last season. The former Oklahoma safety was waived in July after failing his physical due to injury.
The former Wake Forest center Justice was far down the depth chart and missed practice Saturday morning with a sore back.