Barry Bonds -- Someone Jacked My Home Run Champion* Plaque

Barry Bonds GOT JACKED, SON!!!

Someone -- or someones -- stole Barry's famous home run champion plaque right off the stadium wall at AT&T ballpark in San Francisco last night.

The plaque was originally unveiled at the stadium a few years ago, after Barry smacked his 756th* dinger while playing for the SF Giants.

But a rep for the team says it went missing last night -- explaining, "We're not sure what happened. We're reviewing video, but haven't found anything yet.''

Stealing a home run plaque right off the wall?? That's gotta take some big, giant cojones ... so, obviously the culprit isn't a steroid user.