UFC 63: Hughes vs. Penn

UFC 63: Hughes vs. Penn was a mixed martial arts event held by the Ultimate Fighting Championship on September 23, 2006.

The event took place at the Arrowhead Pond in Anaheim, California and was broadcast live on pay-per-view in the United States and Canada.

The event, originally subtitled "Hughes vs. St. Pierre," was scheduled to feature a UFC Welterweight Title match between champion Matt Hughes and Georges St.-Pierre. Nevertheless, a groin injury—which was reported early in August, forced St.-Pierre off the card. At first, St.-Pierre sought a physiotherapist, hoping the injury would heal on its own during training; however, it was later announced that St.-Pierre would indeed withdraw from his long-awaited title shot. Taking his place was former UFC Welterweight Champion, B.J. Penn, who defeated Hughes in a championship fight in 2004, and was beaten by St.-Pierre at UFC 58.

The co-main event saw 'The Crow' David Loiseau taking on Mike Swick in the middleweight division.

The Quad-City Times reported that Pat Miletich expressed outrage that the UFC had apparently scheduled this event alongside a bout he had forthcoming in the IFL, which caused him to miss cornering Hughes and Pulver, fighters whom he coaches, in their UFC matches.