Sentence 1: Jason was the best athlete on the team and thought he wasn't cocky. 
 Sentence 3: Jason was chosen to lead the team 
 Sentence 4:  Three of his teammates were injured under his leadership 
 Sentence 5:  Jason's coach said he was cocky after all 
 Option 1: However his coach didn't believe in him and never let him lead. 
 Option 2: He encouraged his teammates to be as good as him.