Technically yes, if you can lift each corner of the piano high enough AND kick the cup out all by yourself. Lift with your legs, not your back!
The real challenge would be reversing this operation- lift and sliding cup back in place with a foot. I worked for a piano shop long ago and this was basically the same method we would use even to completely remove legs to tilt them up onto the sleds to put on trucks. I think we could do it with just 2 people. Also make sure the castors wont damage the floor…pianos aint light, and those metal castors arent forgiving!