Is it typical for a catalytic converter(sp) to clog in a 2001 vehicle?

Just bought a 2001 Jeep Grand Cherokee Laredo and the c.converter is clogged and needed replaced. Is there something else that caused that or is it just likely age?

waffoo_rn2010-04-27T14:38:37Z

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The converter shouldn't clog up, the exhaust may clog up as fibre glass is used to pack the silencer . The converter can fail if the vehicle has been running over rich or the engine is worn and pushing out lots of unburnt oil.