# 3 ranked super lightweight, Cayo (26-1-1, 18 KOs) was originally scheduled to fight International Boxing Federation (IBF) # 5 Tim Coleman, but in a surprise move, the No. 4 ranking Peterson (24 - 1 -1, 14 KOs) has exercised its right to replace Coleman as the highest ranked cadet available.
Peterson and Key will meet in the elimination of 12-round bout for the No. 1 world ranking and the right to face IBF king Zab Judah.
"Lamont Peterson wants to be champion and he showed today," said Margules. "You take this difficult fight in a relatively short time and it is the fans who will win. Tim Coleman on the map will always be fighting a different opponent, so this show will now feature the FBI is # 3, # 4 and # 5 ranked welterweight contenders. Each of these three against each other would be a terrible fight last night and the fantastic world class boxing in the most beautiful in all the Las Vegas Strip just achieve much more with the addition of Lamont Peterson. "
Peterson was last seen in December in a fight televised on HBO-wannabe big draw with Victor Ortiz. Cayo most recent appearance was a first round knockout over Javier Gomez October 29.
Scheduled for the card is undefeated super-Rance Cuban pen Bartholomew (11-0, 9 KO), and Texas light Hylon Williams Jr. (13-0, 3 KOs) in separate attacks.