Ok...
Took Brundlefly's advice...
brundlefly
It sounds like maybe you originally inserted EZ Drummer as a Simple Instrument track (Combined MIDI and Audio), and then added audio tracks to host the separate outputs. If that's the case, you can right-click the EZDrummer track, and choose 'Split Instrument Track'; then delete the audio track that's probably receiving output from EZDrummer's internal Master bus, and outputting directly to SONAR's Master bus.
and got the drum bus to mute---including the midi track. But that option only left me with one audio track and one midi track(I didn't add audio tracks to host the separate outputs)... so I don't have 16 tracks to tweak each drum.
When I initially opened a softsynth (from my original post), Sonar added the 16 tracks for me automatically. I'm sure I am missing something with regards to understanding signal flow...
The workaround for now is that EZdrummer comes with its own mixer, so I can control things from there, but I still can't compress or eq etc. etc. individual drums.
Appreciate all who are chiming in and offering suggestions.
Thank you!