Posted by ESPN.com's Paul Kuharsky

The Colts re-signed linebacker Jordan Senn as added insurance for injured starters Gary Brackett and Clint Session, according to Mike Chappell.

Brackett indicated he’s day to day with a knee injury and Session missed Wednesday’s practice with his left foot in a walking boot and was listed on the injury report with an ankle.

To make room for Senn, the team waived tight end Tom Santi. A sixth-round draft pick in 2008, Santi started two games and appeared in six last year before landing on injured reserve with a shoulder injury.

Signed as an undrafted free agent out of Portland State in 2008, Senn appeared in 15 games for the Colts as a rookie, totaling seven defensive tackles and 16 special-teams tackles. He had been waived on Sept. 7.

Others who were out of Colts practice: Cornerback Kelvin Hayden (hamstring), defensive end Dwight Freeney (rest) safety Bob Sanders (knee) and receiver Anthony Gonzalez (knee).