This is a video about alternate goalkeepers in soccer. The one I link to has this happen:
1. defender accidentally knocks his own goalkeeper unconscious
2. the alternate goalkeepers replaces the goalkeeper, but then gets hurt
3. an outfield player replaces the alternate goalkeeper, then DOES NOT GIVE UP
Also, they managed to win the match 2-1.
https://www.youtube.com/watch?v=x8XiUBB0cp4&feature=youtu.be&t=1m45s