There are a couple ways I use to get a little info on the sires. Obviously the best way is to run a full report from Equineline or Brisnet.
1.
http://www.brisnet.com/php/BSReview.php# There are BM sire reports - but these are by year. Rather have additional detail by region and all. But if you're into the earnings indexes, you might spot an up and coming one, who is outperforming early.
2. Use the Equibase 5x pedigree. Put Mr. G as stallion with one of his mares (say Acona) which will give both sire stats and BM sire stats (of course one would never really do this):
SIRE of : Mr. Greeley
TOTALS FOR foals* starters (%) winners (%) BW (%) earnings (%) ael
Mr. Greeley 1466 1181 ( 81) 815 ( 56) 64 ( 4) $71,371,793 1.30
BROODMARE SIRE of : Mr. Greeley
TOTALS FOR mares foals* starters (%) winners (%) BW (%) earnings (%) ael
Mr. Greeley 590 2702 1961 ( 73) 1302 ( 48) 79 ( 3) $119,615,316 1.20
3. On older stallions still cranking in the stud book, you can get broodmare stats off the Bloodhorse Stallion Register page button. Mr. G was gone in 2010 so his data from this source would be too old. The current Register has this for Stomy Atlantic: " Stormy Atlantic is the sire of 454 dams of 1412 named foals of racing age, 1029 rnrs (73%), 661 wnrs (47%), 223 2yo wnrs (16%), 1.10 AEI, 1.35 CI; 60 sw, Leading Earner: Time Warp (GB) ($4,972,976). "
its a starting point so you don't have to run a whole mess of expensive reports but the full reports have lots of intersting stuff on what works and what doesn't sometimes despite the nicks.
jm