I do not know the answer to that. Perhaps they do, I imagine people asking here for assistance are hoping to find all the details in one spot, wishing to avoid going from club to club. It's simply my guess that many of the older records (perhaps especially when it comes to Reserves and Under-19s) wouldn't be kept, at least by some clubs.
Does anyone have a more reliable answer to the question that's been posed? Rhett ( rbartlett ), perhaps?
Well, Richmond as an example have never had a list of U19 results or Reserve results.
They have a strong Footy Record collection, but there is nothing existing at the club that list U19/Reserve results
Only recently have we come across gamexgame stats for U19/Reserves players from 1978 onwards in the collectoin.
Hence all that is now in / continues to be updated in Tigerland Archive.
Hope that sheds some light ?