Niner Biocentric I eccentric bottom bracket adapter won't budge
I ended up taking it apart, clean, polish with 600 sandpaper, and grease.  Got it to move / rotate.

It was very dirty as I used that bike to explore the city during a flood. 

If you have this setup I recommend you tear it down and clean every couple years and after submerging in muddy water.

Comment from Nathan is valid if it is totally frozen.  But I would recommend a separate longer bolt.

Got the slack out of the chain: