Originally Posted by speace

If the rotor was free while the caliper was removed, and you replaced the caliper with a new/rebuilt part the only thing remaining is that there is still hydraulic pressure on the caliper.

I'm going to presume you haven't swapped the wheel with one of the incorrect offset that doesn't clear the caliper. (I did that once and wondered why the wheel wouldn't turn...)

The most common thing that retains pressure on the caliper is a defective rubber brake hose. These rupture internally and pinch off the inside of the line. Depending on the rupture, it can HOLD pressure on the caliper, or BLOCK pressure from the caliper.

I presume that opening the bleeder valve on the caliper releases the pressure?

There is nothing related to the master cylinder that could do this to only one wheel...