Are you kidding me?
Percentage of college and HS athletes that go pro. Stats:
Baseball: 11.6% college, 0.6% high school
Football: 1.7% college, 0.08% high school
Hockey: 1.3% college, 0.1% high school
Basketball: 1.2% college, 0.03% high school
Source:
http://www.businessinsider.com/odds-college-athletes-become-professionals-2012-2?op=1It's basketball. They have the smallest teams. It's harder to make it into the NBA than any of those leagues. A third less of HS basketball players go pro than HS hockey players.