Why did the Raiders let Shane Lechler walk?

It's never NOT a good time to question the mental capacity of the Oakland Raiders' organization.  Per John McClain of the Houston Chronicle:

So which one is it?  Probably the latter.  Although the Raiders have managed to get well under the cap recently,  Reggie McKenzie isn't Al Davis--that is to say, he's a whole lot smarter.  The Raiders have needs all over their roster.  Spending a good chunk of money on a punter isn't a priority, nor should it be.

Still, Raiders fans should salute the only player that kept them from losing sixteen games on numerous occasions over the last decade.

I’m glad we had this talk.  Now, vaya con Dios, Brah.

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