Not a big one, but the first one at a pretty young age:
http://www.ellismckinney.com/images/1stbass.jpg

And I guess this was my first big one, 138# Yellowfin at 12. I also got a approximately 120 lb Blue Marlin (small marlin) at 10.

Heres the tuna:
http://www.ellismckinney.com/images/tuna.jpg

I got my first Chinook at the age of 5, which was a big fish too...guess it comes down to what you consider big :)

But I guess I got a really early start, as you can see in the first pic...my first word was 'ish' (trying to say fish).