I think Carr will be the starter next year regardless. He is the best QB we have on the roster (not saying that much), but we cannot cut him without eating a bunch of dead cap $$.
Rattler may get a shot as the year progresses if DC isn't producing wins.
If Carr's contract is left untouched he would cost $1.5 million less to cut that it would to keep him. Yes, you don't have the player, but he would be off the books for 2026 as well.