I was looking at rebounding records and stats of certain players and I keep seeing the stats seperated before 1973 and after 73. why is this? was there a rule change pertaining to rebounding? What significance does '73 have? P.S. the stats were of colegiate players. Here's a link to the records: (which I find informative and interesting)
2009 NCAA Men's Final Four Records - NCAA.org
After you go to the site, click on "the tournament" to view the PDF file and scroll down to rebounding records and you'll notice they are seperated pre and post 1973.