Key Blue Diamond Prelude runner Defcon has been scratched from the race due to his blood picture being slightly off.
Defcon was the $4.60 favourite for the race with Sportsbet.com.au before coming out.
Peter @SnowdenRacing1 says Defcon blood picture was slightly off. If rebounds will barrier trial at Rosehill Monday then run Silver Slipper.
— Andrew Bensley (@AndrewBensley) February 12, 2016