A common observation during NBA games is that players often shield their mouths while communicating with teammates, coaches, or even opposing players. This behavior is primarily employed to prevent opposing teams from eavesdropping on their strategies and play calls. The act serves as a visual barrier, making it more difficult to lip-read or deduce the intended message.
The increased media coverage and technological advancements have made it easier to analyze game footage. Consequently, teams are more conscious of protecting their in-game communication. This practice has evolved from a simple precaution to a widely adopted tactic, reflecting the high stakes and competitive nature of professional basketball. Historically, teams relied on hand signals and coded language, but covering the mouth provides an additional layer of security against sophisticated scouting methods.