Women's Soccer USA: Wambach played with a broken toe

Athletes play with injuries. I played with torn ligaments in my foot (undiagnosed until after the season).
We can safely assume that the US National coach and trainer knew about Abby's broken toe, but maybe not even the rest of the team: "loose lips sink ships" and all that. If a player is known to be playing in such a way as to protect from further injury, that can be exploited by other teams, so it definitely should be kept quiet. Even the NFL is very vague about the extent of injuries so as not to tip off the other team to weaknesses.
Women's Soccer USA: Wambach played with a broken toe