Sentence 1: I invited my friend over to join my team as a substitute. 
 Sentence 3: He said if it's fine for the referee, it's fine to him 
 Sentence 4:  After asking the referee, he said it was within limits 
 Sentence 5:  He obliterated the competition and we managed to win by 4 goals! 
 Option 1: He couldn't play because of an ankle injury. 
 Option 2: He agreed and I went to the coach to ask if he could join.