Laboring Littell has work to do in limited window before Opening Day

Zack Littell struggled today in what will have to be his final major-league exhibition start before the Nationals' season commences

JUPITER, Fla. – In a perfect world, Zack Littell would have more time to prepare for his first start of the season. The calendar, though, offers no such opportunity. If Littell is going to make the Nationals’ Opening Day roster – and unless he’s hurt, he has to – he’ll do so without making another official spring training start.

Littell already faced a t…