Can referee throw ball in when only one team is lined out in a gaelic football match?
Yes. It has happened, most famously in the 1987 league semi-final between Dublin and Cork. When the match finished level Cork left the pitch, thinking it was over. However it went into extra time, instead of a replay. The referee threw in the ball to start extra-time with just the Dublin team on the field. Dublin scored a goal into the empty Cork goal and went into the final, where they beat Kerry.
