Sure but IMO none of those guys are better than Carr. If Moore thinks one is better then sure do it. I just think it makes more sense to bring in young guys to see if they can become franchise QBs by playing them rather than signing journeymen who very likely are at their ceiling and likely won't be on your team for long.
And, if you are not going to roll the dice on a young guy, I'd rather stick with Carr who you know is at least a mid-level QB.