The middleweight bout between Ryan Jensen and Steve Steinbeiss will not take place due to a medical approval issue regarding Jensen.
And Steve Cofield gets to the bottom of the story on Yahoo.com:
Ryan Jensen was looking for his first win in the UFC but when he disclosed to the Tennesse Athletic Commission that he had used the drug Adderall, his fight against Steve Steinbeiss was canceled. Tim Credeur tested positive for the same drug before The Ultimate Fighter 7 Finale. That TUF 7 fight against Cale Yarbrough was canceled. Adderall is used to treat Attention Deficit Hyperactivity Disorder and Narcolespy.