The Jacksonville Jaguars placed linebacker Freddy Keiaho on injured reserve, the Florida Times-Union reports.

Keiaho sustained a concussion during the Jaguars' pre-season opener against the Philadelphia Eagles.

To fill Keiaho's spot on the 80-man roster, the Jaguars signed linebacker Alvin Bowen.

A fifth-round pick (147th overall) out of Iowa State by the Buffalo Bills in 2008, Bowen (6-1, 222) spent his rookie season on injured reserve and was waived by the Bills at the end of last year's training camp.

Bowen split between the Bills and Washington Redskins practice squads before being added to the Redskins' 53-man roster for the final five weeks of the regular season. The Redskins cut Bowen on June 9.

Signed by the Seattle Seahawks on August 7, Bowen led the 'Hawks in tackles during last Saturday's game against the Tennessee Titans, but was waived on Tuesday when middle linebacker Lofa Tatupu returned to practice.