UFC 101: Declaration[3] was a mixed martial arts pay-per-view event held by the Ultimate Fighting Championship (UFC) on August 8, 2009 in Philadelphia, Pennsylvania.

[3] The event featured the second title defense of Lightweight Champion B.J.

Penn against Kenny Florian, and a non-title Light Heavyweight bout for Middleweight Champion Anderson Silva against former Light Heavyweight Champion Forrest Griffin.

A previously announced bout between Rousimar Palhares and Alessio Sakara[4] was cancelled due to a broken leg suffered by Palhares during training.

[6] George Roop stepped in against George Sotiropoulos after Rob Emerson pulled out of the matchup due to a cut requiring stitches.