"The Pelicans are desperately seeking frontcourt help, particularly a center they can put next to blossoming star Anthony Davis. New Orleans sent Robin Lopez to Portland in the offseason as part of the deal that landed them Evans, but have not been able to replace him. For the last four games, coach Monty Williams has gone with Alexis Ajinca, signed from the French League last month, as his starting center."
I can understand that with Tyreke Evans playing good and Evans is not injury prone like Gordon. Plus they need a center (When they had one in Lopez)