This article references A, Sean Doolittle, Tyler Clippard and more! Sean Doolittle will begin a rehab assignment later this week as the Oakland Athletics’ closer gets closer to making his 2015 debut. The 28-year-old left-hander was given an opportunity to take the reigns as the closer in 2014 and he did just that. Doolittle converted 22 of 26 save opportunities last season. In 2015, he has been dealing with a shoulder strain that has forced him to miss more than the first month of the 2015 season. The Athletics confirmed a CSN California report that Dool[...]Keep on reading: Sean Doolittle (Shoulder) To Begin Rehab Assignment This Week