The New Orleans Saints have suffered a significant loss during Organized Team Activities.
Butler had to be helped off the field after a collision with running back Mark Ingram in what was supposed to be a non-contact practice. Saints coach Sean Payton said afterward that he thought the team dodged a bullet and that Butler was not badly hurt, but apparently an MRI showed otherwise.
A 2009 fourth-round pick of the Cowboys, Butler has played his entire NFL career in Dallas but signed with the Saints this year. He was already familiar with the defense run by new Saints coordinator Rob Ryan and was expected to be a starter. Now he is expected to spend the season on injured reserve.