Unfortunately, in spite of modern equipment, player safety rules, and proper training, there is always the risk of a serious injury in youth sports.  It's important to keep several things in mind in the event of any emergency involving a player.

• Keep your cool.  Stay focused and assess the situation.  Is the player alert, can the player move on their own, where does it hurt?  Gather the basics and focus on the player, not on getting the game started again.  When in doubt, summon medical personnel that may be present at an event or game, or call 911 if needed.
• Ask for help.  Have another parent call 911 if necessary and ask if any of the other parents present are medical professionals or first responders.  Our community is filled with medical experts, military personnel, and first responders that have all been trained in first aid and can help.
• Communicate.  If parents aren't already present, have someone notify them of the situation and look for ways to support them.  In addition, it's important to talk to other players as they will likely be upset as well and may need some encouragement or a break to deal with the stress of the situation. 

In any emergency, it's important to focus on the player and their wellness first and use good judgement.  Staying calm and focused, asking for help, and communicating with those around you will make the best of a difficult situation.