Blues youngster Troy Menzel has replaced Ellard in the final 22, while Dennis Armfield has been upgraded to the emergency list.
Ellard played in all five of the Blues' games to open the season. He averaged 11 possessions per game and kicked seven goals.
The Blues are set to be boosted by experience, with Brock McLean, Jeff Garlett, Michael Jamison and Mitch Robinson all making their way back into the side.