Washington Nationals outfielder Kyle Schwarber (hamstring) will undergo an MRI on Saturday. Schwarber exited Friday's matchup against the Dodgers because of a right hamstring injury, and according to skipper Dave Martinez, team medical personnel don't know how severe the ailment is. The 28-year-old has been on a roll lately, so a potential trip to the IL can't come at a worse time. Fantasy managers should keep their fingers crossed for good news while also preparing for the alternative. Gerardo...