Wash on cold. Use a Scotch color catcher. Dry on low.

No, in fact it's probably better not to because the fabric contains starch and sizing that will help with stability of the fabric while piecing. If you wait to wash until after the quilt if finished you will also get better crinkle. The only time I wash fabric prior to cutting is if I'm using a really dark fabric with a very light fabric. I will wash the dark fabric in this scenario.