On a number of occasions throughout history, notable sporting participants have been involved in violent confrontations with spectators during a competition. This list includes events in which a spectator at a sporting event was engaged in such a confrontation with an athlete, coach or game official, either through the spectator's intrusion upon the field of play, or (as a result of such an event) a participant entering the spectator seating area. Incidents of object or snow throwing are included when it results in injuries to a match participant or causes significant delays or cancellation of the event.