Walden (biceps) will seek a second opinion this week to determine the next step in his rehab process, Jenifer Langosch of MLB.com reports. The current diagnosis for Walden is right biceps inflammation, but the team wants another doctor to look at Walden's MRI before plotting out a course of action for his rehab. With Walden's status in limbo, the Cardinals will likely lean on the tandem of Seth Maness and Kevin Siegrist to handle setup duties.