Debating whether a player deserves to land in the ESPNU 100, or whether he's a mid- or high-major player, is fun but it's not an exact science.

With the updated ESPNU 100 published earlier this week, combined with little movement in this week's Mr. Basketball USA Tracker, it's a good time to discuss why some of the players deemed the nation's best don't excel in the NBA.

First off, it's important to note the majority of the top five players in each class will enjoy NBA careers. In fact, every season since 1989-90, the ESPNHS Mr. Basketball USA honoree has eventually played in the NBA. Only two all-time selections dating back to the 1954-1955 season did not.

To read the rest of this story and see the Mr. Basketball USA voting results, CLICK HERE.

Ronnie Flores is a senior editor for ESPNHS. He can be reached at ronnie.flores@espn.com. Don't forget to follow him on Twitter: @RonFloresESPN