Silva is awaiting the results of an investigation from the Nevada State Athletic Commission surrounding one of his UFC 125 drug tests. While no formal complaint has been filed, the UFC looks to be airing on the side of caution.
Hamill (10-2, 9-2 UFC) is riding a five-fight win streak, although one of those wins was due to a Jon Jones disqualification. Most recently, Hamill defeated Tito Ortiz by unanimous decision at UFC 121 last October.
Jackson (31-8, 6-2 UFC) is coming off of a close split-decision victory over Lyoto Machida at UFC 123 last November. It was revealed that Jackson was offered a championship bout against Mauricio "Shogun" Rua at UFC 128, but he did not feel that he would have adequate time to prepare.
Hamill last three fights:
Win (Unanimous Decision) Tito Ortiz - UFC 121: Lesnar vs. Velasquez (10/23/2010)
Win (Majority Decision) Keith Jardine - Ultimate Fighter 11 Finale (06/19/2010)
Win (DQ - Illegal Elbows) Jon Jones - Ultimate Fighter 10 Finale (12/05/2009)
Jackson last three fights:
Win (Split Decision) Lyoto Machida - UFC 123: Rampage vs. Machida (11/20/2010)
Loss (Unanimous Decision) Rashad Evans - UFC 114: Rampage vs. Evans (05/29/2010)
Win (Unanimous Decision) Keith Jardine - UFC 96: Jackson vs. Jardine (03/07/2009)
Props: MMAJunkie.com
