David Haugh: Arrieta's immediate response to injury a refreshing reminder for Cubs

We live in a professional sports world in which caution rules and athletes insulated by fear of injury too often protect their self-interests with bubble wrap, carefully plotting every move to maximize their earning potential.

That safe, me-first culture occasionally pits cautiousness versus competitiveness, prudence against passion, and puts millionaire players in the uncomfortable position of placing their next contract ahead of the immediate challenge.

Then there is Jake Arrieta, the Cubs ace of the second half, whose pending free agency sounded like it was the furthest thing