[EricH]

Could it be legal, if they were wired? Possibly.

That would probably last about as long as it took for someone (like the coach) to hit the end of the wire, or someone to trip over the wire, or similar issues. At that point, it's a safety problem. And, as a general rule of thumb (and keeping thumbs intact), if it's unsafe, mitigating measures will need to be taken. In this case, the easiest is not to use wired earpieces.


I think the guy in the video is listening to music in one ear. I've heard of drivers doing that, helps them relax and focus and tune out unnecessary noise. OTOH, I'm not entirely sure if I'd want someone doing that during the match if I was the coach...