Each MLB Team's Most Crucial Early-Season Storyline

The second week of the 2015 MLB season has only just begun, but from the return of Alex Rodriguez to a flood of unfortunate injuries, there are already more storylines to keep track of than there are in an episode of HBO's Game of Thrones.

It's a dangerous game to play to make sweeping generalizations at such an early stage of this 162-game marathon. Then again, from the good to the bad to the downright unexpected, plot lines are already developing that could seriously impact how the 2015 season shakes out.

While Jon Lester has stumbled out of the gates, a rising star in the AL East is putting all sorts of skills on display and one squad left for dead in the spring has stormed to a first-place start.

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