So riding home thought the rear end felt a little mushy, but made it home fine.  Got up the next morning and put a guage on it and it was dead, picked up a nail.  Initially was going to just plug it, but since I bought the tire (mounted) from Discount tire and they fix flats for free,  I took it to them instead.  They un-mounted it, patch/plugged it from the inside and re-mounted it, no muss no fuss no charge.   
Guess that is why I buy all of my tires from there.