Hey Marco!
Yes, Mike Stern did come out with a more 'straight-ahead' album way, way back, as fusionenigma said, 'Standards (and other songs). I'm pretty sure he's followed that up with more recent 'trad' stuff, but I'm not exactly sure what their titles are.
As for Pat Martino, I think most of his earlier works were bop-based, such as 'Consciousness' or 'Exit.' Although he did get a little more daring at some point by fusing more brazen rock elements, like what he did on 'Joyous Lake' (which remains my fave Martino album).