Although I was kind of a mission buff from the time I was a kid, I had never heard of this one until I noticed the historical marker one day while working on Mission Road.
The Mission San Francisco Xavier de Nájera. Now it's a golf course. And some loser had to tag it, of course. It's easy to miss this marker because it's behind a mesquite tree when northbound on Mission Road, and partly covered by draping mesquite limbs when southbound.