Every so often I have a question for a referee, but I'm reluctant to start a new thread for relatively minor points. Instead, I thought I would create a catch-all thread - questions from others are welcome, of course - and see where that takes us. Team captain. 1) Must a team have a designated captain at all times? I assume that yes, one player must be designated as captain at (virtually) all levels of the sport (above a certain age). 2) Can a team change its captain without the captain leaving the field? I ask because of what happened at last night's Mexico v. Canada game. C. Blanco came on as a late sub, and - as Blanco had just announced his international retirement - R. Marquez ceremoniously removed the captain's armband from his own arm and affixed it around Blanco's. The announcers - accustomed to seeing this sort of switch only when the captain is subbed off - wondered allowed if this spontaneous redisignation was permitted by the laws of the game. Any ideas?