I have an outdoor faucet/spigot that is very loose. This is in the garage wall, and was added about a year ago. I’m not very high on the plumber that did it, so definitely not calling him back out.

It can move in and out, and turns. Best way I can secure it?

Cut a hole in the dry wall on the back side and sweat it back on, would be my guess.

I would use a masonry drill bit to drill into the brick and put two anchors in the brick then run two screws through the holes in the faucet to secure it to the wall.

That looks like an Arrowhead brand faucet, they usually either are sweated in or screwed in.

With it turning like you said sound like it was attached with a Sharkbite fitting, which would be a good reason not to have the guy who installed to ever come back.

It’s a “freeze proof” faucet and they screw into a threaded elbow. If it’s not leaking, just attach with masonry screws. They are designed to not have water inside the faucet outside the wall. Most are not installed correctly.

The elbow should be secured so it shouldn’t move in/out.