We will just have to disagree on this. To me, moving from a partially to fully torn ligament is a single injury, as no surgery was performed in between and the original injury had never healed.Tannehill partially tore his ACL and MCL vs Arizona. He tried to let it heal via stem cells and rehab. He then tore the same ACL in camp. So basically he had a partial tear and then a complete tear. So he injured his ACL twice but he's only completely tore it once...for those that seem to be confused on this.