The team also signed center Bradley Vierling to the practice squad and waived linebacker Sidney Tarver from the practice squad.
McBath becomes the 29th player Jacksonville has placed on injured reserve this season.
Vierling spent the preseason with the Jaguars before he was placed on injured reserve in late August. He reached an injury settlement a few days later. He spent all of last season on Jacksonville's practice squad.
Copyright 2011 by The Associated Press