With no comment specifically on how you interact with the Adamo saddle, yes it is possible that a saddle can place pressure on the origin tendons of the hamstring. This may cause exasperation or onset of injury.

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with no medical background, my guess would be yes, but I would also say that I'm not sure you could isolate the problem to the saddle...how do you know that riding itself isn't aggravating it?

I'm not entirely sure its the saddle but it seems to putting a lot of pressure right were I feel the strain in the hamstring. The strain hurts the most after biking (not so much running) so I guess maybe just riding is causing it too. But I've used this set up for 3 years without this problem so this is why I'm wondering if direct pressure from saddle is aggravating it. I guess I will try my road bike to see if I noticed the difference which has a different saddle.