The Jacksonville Jaguars are revamping their beleaguered secondary.

The Jaguars waived defensive back Michael Coe on Monday, a day after he got beat for a 61-yard touchdown against Philadelphia, and re-signed safety Gerald Alexander.

They also signed veteran linebacker Eric Alexander, who spent six season with New England, and added former St. Louis Rams quarterback Keith Null to the practice squad. A sixth-round draft pick in 2009, Null started four games last season and threw three touchdowns and nine interceptions.

To make room for Eric Alexander and Null, Jacksonville released tight end Ernest Wilford and waived quarterback Brett Ratliff from the practice squad.

Gerald Alexander started 10 games for the Jaguars in 2009, but was released in final cuts earlier this month. They brought him back because Anthony Smith is sidelined with a toe injury and safeties Sean Considine and Courtney Greene struggled in lopsided losses against San Diego and the Eagles. Coach Jack Del Rio said Alexander could play Sunday against Indianapolis.