The Cardinals are signing linebacker Joe Walker to their 53-man roster off of the Eagles’ practice squad, a source tells Jeff McLane of the Philadelphia Inquirer (on Twitter). The Eagles, meanwhile, have filled Walker’s roster spot by promoting running back Josh Adams to the active roster. 
Walker, 25, appeared in 12 games for the Eagles last year and started in three games. He didn’t see a ton of action on defense, however, and finished out with eight total tackles.
The Cardinals can use all of the defensive help they can get after surrendering 34 unanswered points to the Rams on Sunday. Walker won’t be a starting option, but he could see some snaps behind middle linebacker Josh Bynes.
They didn’t fill his roster spot with Josh Adams. Both were on the practice squad. To make space for Adams on the 53, they cut WR DeAndre Carter
I caught that too.