The UFC has now confirmed that David Tarrell was forced to withdraw from his UFC 78 fight with Ed Herman due to a severe ankle injury suffered in training. Joe Doerksen will take the spot to fight Ed Herman on the main card at UFC 78 in Las Vegas, Nevada. Doerksen is actually a good replacement for David Tarrell. In 2004 Doerksen defeated Ed Herman by submission at Sportfight 7. It should be a great match up, both fighters like to stand up and bang.