Driver side rear wheel

Have have been noticing that after a 10-20 min. highway drive my driver side rear rim is getting really hot. I had to get a brake job done on the car anyway and the went ahead and rebuilt both rear calapiers. We thought that this would take care of the problem but it still continues. The other night I started hearing a screaching sound from that wheel while I was driving down a side street. With the rim still getting hot and the noise I am starting to think that the wheel bearing could be bad. Any opinions.