The Saints initially thought they dodged a bullet during Tuesday's workout when outside linebacker Victor Butler and running back Mark Ingram "banged knees." As it turns out, the defensive depth chart took a direct hit.
An MRI exam releaved Wednesday that Butler has significant ligament damage and likely suffered a torn ACL, according to multiple reports.
Coach Sean Payton said after the workout that he thought Butler would be fine. Butler played as a backup the past four seasons with the Dallas Cowboys, but was in line to play a more significant role in the Saints' new-look defense.
Butler had been working with the first-team defense at strong-side linebacker. Butler has been competing at that spot with third-year pro Martez Wilson, who will be asked to do a lot of pass-rushing along with some pass coverage duties against the stellar collection of tight ends in the NFC South.