Scotty 2 Hotty -- Ex-WWE Star ... I'm a Fireman Now!

The next time you call 911 to report a fire ... the guy racing to your house could be former WWE star Scotty 2 Hotty ...'cause TMZ has learned the master of "The Worm" is a certified fireman!

Scotty -- a former member of the tag team Too Cool (later joined by ass-bomb expert Rikishi) -- graduated from Lake Tech Fire Academy in Florida earlier this month and plans to begin EMT training in the next few weeks.

But Scotty's new career doesn't mean his wrestling days are over -- the 39-year-old -- real name Scott Garland -- still hits the mat on the independent wrestling circuit.

As for Rikishi -- he's still around too ... presumably ass-blasting people who really deserve it.