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.
Adam Dunn played 2,001 Major League games, but never appeared in a single postseason game (the 14th most in baseball history). Here is a list of every big league player with 2,000+ games played with no postseason appearances: #13. Cy Williams (2,002 games played), #12. George Sisler (2,055 games played), #11.