Military personnel in uniform are required to salute when they meet and recognize persons entitled (by grade) to a salute except when it is inappropriate or impractical (in public conveyances such as planes and buses, in public places such as inside theaters, or when driving a vehicle).
One notable player, Shawn Kemp, enrolled in college but never played any games due to personal problems. In 1989, a year after his high school graduation, he was drafted by the Seattle SuperSonics. He played 14 seasons in the NBA and was selected to 6 All-Star Games and 3 All-NBA Teams.
As the legend goes, Oscar Robertson never dunked in a single game. Three players who played earlier this NBA season would've qualified for this list had they not been cut before the end of the year: A.J. Price, Jannero Pargo and Jason Kapono. And finally, I fully recognize the stones/glass houses aspect of this.