Sanzenbacher was released this week by the Bears and was picked up Tuesday by the Bengals. He played in five games with one catch for 7 yards this season.
Kirkpatrick, the 17th overall selection in the 2012 draft, has been sidelined with a knee injury. He played in five games this season, with two tackles on defense and two on special teams.
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.