I applied to CA programs this year as a DO. Top quartile and competitive board scores.
Didn't interview at UCLA-NPI, UCI, UCSD or UCSF. Maybe there were other holes in my app, I don't know, but I thought I'd at least get one interview out of those four. As an fyi, no DO has been in any of those programs over the past four years (don't know about UCSD since I didn't find residents listed on their website).
Good luck.