There is a direct connection between "uncertainty about the future" and discontentment with his contract... His management team knows that he is at risk because he is on the back end of a contract with a high salary to cap hit ratio. He wanted a contract that would guarantee he receive those huge salaries for the next few years. He is right to address it, because his current and future value as a football player does not justify those numbers (which is the reason why he sought a remedy for it). Even Andre knows that he is currently overpaid, based on the market... funny that fans of the team can't see it.
I guess it depends on how you define market value. Sports franchises frequently pay their declining hall of fame caliber players more than their performance strictly warrants. It is a business decision.
You also have to look at replacement value. The Texans would have to use the money saved to replace Dre's very real, very important contributions to the team. I think that Rick Smith would screw it up. He'd blow the money and the Texans would have less talent to show for it.
As far as it being "funny that fans of the team can't see it". I always thought it was funny that fans couldn't see how absolutely mediocre and dead-end Smithiak was. I think it is far easier to believe that Dre has value to the team right now - even at his current salary - than it was to think right track, right track in response to year after year of little or no growth - even negative growth - for the team. Maybe if you reflect on that you can understand why fans have it so wrong about Dre Johnson right now. You might even consider which fans have it wrong, but that would take a much greater leap.
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As far as Dre goes, I was on record for having the Texans find a way to trade him this season. I wasn't tough enough of an armchair GM to say take the Texans millions or retire. He did take the millions, and now that is being complained about.
If they want to cut him next year, I'm good with that too. In that event, Dre will take a big pay cut but still probably pocket a few million, possibly with a contender. The Texans will save all that money. They will be worse off offensively, but that will also be Dre's fault for not just taking a pay cut with the Texans. Everybody wins!*
*Except for that uninformed minority that want the best product on the field, of course.