The oft-injured Nationals reliever has gotten back on track in 2017, and should play a huge role in Washington's postseason.
For the first three seasons of his career, Sean Doolittle was as good of a reliever as you could find, a devastating strikeout artist who was more than just a left-handed specialist for the Oakland Athletics.
Doolittle made a name for himself with a stellar 2014 season, a performance that earned him a five-year, $10.5 million extension. It also marked the last healthy season he would have in some time.
Beginning with a partially torn rotator cuff announced in January of 2015, Doolittle and his left arm were relegated to the disabled list a multitude of times in the 2015 and 2016 seasons.