Navy, USMC, and USCG reserve, no. You must be a winged military aviator to get a flying slot in the sea-services. Usually this means extensive prior active duty, but I suppose it's remotely possible that a guard pilot could get his commitment transfered to the navy...but I wouldn't bet on that.

I think the Navy used to do street hires back in the 80's (at least for NFOs) but no longer.