Underhill thinks Carr will be Saints starter [mod edit: Moore-Carr meeting went well; Saints plan is to keep Carr in 2025 & figure out contract]

If Loomis wants to do an extension to spread out the cap hit. They have to work with Carr on that.
No extension needed. With the void years he still has 5 on the current contract. That is the max you can prorate a signing bonus.