Bleacher Report Link Ajayi's origins, college, and start to the season. Solid and interesting article. Go read it now.
You're probably better off saying He took to long to become the feature back. With his performance in preseason, and his attitude by all accounts, he wasn't ready to take on that roll. Whether it was Gase leaving him home week 1, the presence of Foster, or Ajayi just battling through the adversity he was being faced with, that's what's made him into the player he's become. He wasn't there mentally, and of course we never had a healthy OL early on too. He had to earn it, and he has.
