UFC officials announced the change on Friday, but did not reveal the reason for Kang’s withdrawal.
Coming off of a victory over David Grant to capture The Ultimate Fighter 18 bantamweight crown, Holdsworth (5-0) is looking to step out of the shadow of the reality series and into the Octagon’s white-hot spotlight.
Camus is 14-4 and has won his two most recent bouts heading into the fight with Holdsworth.
A bout between UFC bantamweight champion Renan Barão and TJ Dillashaw headlines UFC 173, after middleweight titleholder Chris Weidman had to withdraw from the card due to nagging knee injuries induced him to pursue surgery.
UFC 173 takes place on Saturday, May 24, at the MGM Grand Garden Arena in Las Vegas.