Thanks Bushwick. My initial thought was pulling it with my other vehicle to break loose whatever was stuck, but thankfully common sense kicked in and I decided against going that route.
I tried hammering on the wheel back and forth a bit with a rubber mallet, but have not yet taken the wheels off. I will try doing that tonight or this weekend.
I was worried at first it may be a transmission issue since my transmission had failed before, but I am leaning towards brakes since the transmission was functioning in low gears just fine when I moved it. I am no expert though.