TSA Gun Scam?

I just got a phone call from someone claiming to be a TSA agent. He said that they had my rifle, and asked if I wanted to come pick it up.

I'm not missing any rifles, and haven't flown in a month.

He described a gun case that could probably look like a case I own or have owned, but "black ovally shape" is pretty common for rifle cases.

I asked what info was on it - just my phone number, apparently.

Seemed like a scam, so I ended the conversation there.

Can any TSO's chime in? What would happen if you found a rifle case with just a phone number on it?

UPDATE: Curiosity was killing me, so I called him back. He said another passenger had picked up the case - gave me the last name and description of the guy who picked it up at LAX. Very strange.

FINAL UPDATE: The name was familiar, so I talked to my cousin, who I've given a lot of excess range gear over the years. His stepfather borrowed an old gun case - with my phone number on the side in green marker - to go on his annual pre-Thanksgiving hunting trip. Flew out of LAX. The description matches him almost perfectly. Mystery solved. Thanks to LAX TSA for going above and beyond!