Thanks guys. Not having a band saw, I removed about 3 rings from the belly side yesterday to give me a flat surface instead of a wedge stave. So, I practiced chasing rings while I was removing this wood. It there were sapwood dips in all those rings, also.
Edited: Sapwood might not be the correct term for the lighter color ring between the darker rings.
Would there be any problem with leaving the sapwood, if it pulls out during earlier tillering stage, could I remove it then?