Posted: 18/08/2012 at 13:19
Presumably there were drainage holes. The roots will absorb moisture though there's a limit to how much. They will only take what the plant needs but, if there's excess moisture, they will just sit there wet and with every likelihood of drowning and rotting.
It's always a good idea to clean tomato pots between growing seasons anyway. A good scrub with a 1:10 bleach solution will do the job. Wear gloves!