JACKSONVILLE, Fla. (AP) - The Jacksonville Jaguars have placed guard Will Rackley on injured reserve, ending his season and creating depth issues along the offensive line.

Rackley sustained a high ankle sprain early in training camp and re-injured it last week. He joins guard Jason Spitz and center John Estes on injured reserve. It means undrafted rookie Mike Brewster from Ohio State could play a pivotal backup role for Jacksonville this season.

Brewster was one of four undrafted players who made Jacksonville's 53-man roster Friday night. Safety Antwon Blake, receiver Kevin Elliott and linebacker Julian Stanford are the others.

The Jaguars released/waived safety Courtney Greene, defensive tackle Corvey Irvin, safety DB Rod Issac, cornerback Trumaine McBride, running back Richard Murphy, quarterback Jordan Palmer, offensive tackle William Robinson, CB Leigh Torrence and WR Demetrius Williams.