@Crimsonorblue22
There are lots of four year players in the NBA, obviously. But look around the college landscape. Most 4 year players aren't on that level.
More often than not, when it comes to stars, you won't see many 4 year players on that list. Let's check the last 5 years of All NBA teams (first, second and third teams). These are the best 15 players in the league for that year:
2011
0 years of college - Lebron James, Dwight Howard, Kobe Bryant, Pau Gasol, Dirk Nowitzki, Amar'e Stoudemire, Manu Ginobili
1 year of college - Derrick Rose, Kevin Durant, Zach Randolph
2 years of college - Dwyane Wade (at Marquette three years, but ineligible as a freshman).
, Russell Westbrook, LaMarcus Aldridge, Chris Paul
3 years of college - Al Horford
2012
0 - James, Howard, Bryant, Andrew Bynum, Parker, Nowitzki, Tyson Chandler
1 Year of college - Durant, Kevin Love, Carmelo Anthony
2 Years of college - Paul, Blake Griffin, Westbrook, Rajon Rondo, Wade
2013
0 - James, Bryant, Marc Gasol, Parker, Howard
1 - Durant, Anthony
2 - Paul, Griffin, Westbrook, Paul George, Wade, Harden
4 - Tim Duncan, David Lee
2014
0 - James, Howard, Parker, Al Jefferson, Goran Dragic
1 - Durant, Love
2 - Harden, Paul, Griffin, George, Aldridge
3 - Joakim Noah, Stephen Curry, Damian Lillard (redshirt junior due to injury)
2015
0 - James, M. Gasol, P. Gasol
1 - Anthony Davis, DeMarcus Cousins, DeAndre Jordan, Kyrie Irving
2 - Harden, Westbrook, Paul, Griffin, Aldridge
3 - Klay Thompson, Curry
4 - Duncan
So we can take out the foreign players - Nowitzki, the Gasol's, Tony Parker, Manu Ginobili, Goran Dragic - they took up 11 of the 75 spots. That leaves 64 spots.
Of those 64, the breakdown is as follows:
No college - 16
One Year - 14
Two Years - 25
Three Years - 6
Four Years - 3
That is pretty telling. If you're playing in college for three years or more these days, the likelihood that you will become an NBA star is pretty low. The chance of Hield or Valentine or Wiltjer being a star at the next level is low. For a guy like Melo Trimble, or Ben Simmons, the chances are actually pretty good, particularly since you would need to lump the No college and 1 year guys together due to the rule change.
Going back further, here are the four year All-NBA guys since 2000, along with the year they entered the NBA:
- David Robinson - 1987
- Tim Duncan - 1997
- Gary Payton - 1990
- Grant Hill - 1994
- Karl Malone - 1985
- Alonzo Mourning - 1992
- Ben Wallace - 1996
- Steve Nash - 1996
- Sam Cassell - 1993
- Brandon Roy - 2006
- David Lee - 2005
Check that out. Not a single four year player drafted after 2006 was named All-NBA. That's very telling. Since the start of early entry straight from HS, the best players leave college every year. Kevin Garnett debuted in the NBA in 1995. Only five players above left college after that. Now that we are in the OAD era, who are the best players. The evidence above suggests it is probably those freshmen and sophomores.