The Sharks have omitted Anthony Tupou and David Fifita from the originally selected 19-man squad for the game against the Bulldogs today.
Coach Shane Flanagan has decided on Ben Barba, Chris Heighington, Jayson Bukuya and Matt Prior as his four interchange players for today's game.
Tupou was to have returned from a lengthy layoff due to a badly broken jaw and is now likley to make his comeback next weekend when the Sharks travel to New Zealand to play the Warriors.
The Sharks starting 13 is unchanged.
The Sharks v Bulldogs match kicks off in little over an hour.