Jared Padalecki (Sam Winchester) dislocated his shoulder while wrestling with Osric Chau (Kevin Tran). The writers were then forced to make up a story as to why Sam was wearing a sling in the beginning of season ten. None of the cast or crew members ever expected the show to last as long as it had.

Jared Padalecki's character Sam could be seen wearing a sling for several episodes at the beginning of season 10. The reason? Jared dislocated his shoulder while wrestling fellow castmate Osric Chau!