UFC 84: Ill Will was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on May 24, 2008, at the MGM Grand Garden Arena in Las Vegas, Nevada. The card featured the return of Sean Sherk, who was suspended and stripped of his UFC lightweight title after he tested for steroids at UFC 73. He faced B.J. Penn, who had since won the vacated title.
B.J. Penn
Sean Sherk
Wanderlei Silva
Keith Jardine
Goran Reljic
Wilson Gouveia
Lyoto Machida
Tito Ortiz
Thiago Silva
Antonio Mendes
Rousimar Christian Palhares
Ivan Salaverry
Rameau Thierry Sokoudjou
Kazuhiro Nakamura
Rich Clementi
Terry Etim
Yoshiyuki Yoshida
War Machine
Kim Dong-hyun
Jason Tan
Shane Carwin
Christian Wellisch