When he walked into the St. Louis Rams training facility Monday , it hit him that his dream had become a reality .
LOUIS -- Aaron Donald has been dreaming of playing in the NFL since he was 5 .
When Aaron Donald walked into the St. Louis Rams training facility Monday , it hit Aaron Donald that Aaron Donald 's dream had become a reality .
LOUIS -- Aaron Donald has been dreaming of playing in the NFL since he was 5 .