Ryan Zimmerman (hamstring) threw a baseball on Thursday, but there's still no timetable for his return.
Zimmerman has been on the DL since July 23rd with his hamstring injury and though throwing is a good sign that he has begun to rehab he will still need to run and hit before being activated.ANALYST: Jonathan Impemba
Miguel Castro will open the season in the majors.
Castro flew under the radar in the minors last season, but is making the rare jump from A-Ball to the majors. This is thanks to his (likely) temporary move to the bullpen for the Spring, which enabled his stuff to tick up a bit in shorter outings. He's likely next in line to receive saves should Brett Cecil fail, and the 20-year old is worth keeping an eye on. Analysis: Ben Diamond