Blankenburg was waived by the Predators on Thursday, per PuckPedia.
Blankenburg played in 12 regular-season games for the Blue Jackets last year, notching one goal, 10 shots and 21 hits while averaging 16:13 of ice time. The 26-year-old blueliner figures to spend the majority of the upcoming season in the minors with AHL Milwaukee, though an injury or two could see him called up later in the year.