Washington Nationals infielder Starlin Castro shifted over to the hot corner for the first time during Grapefruit League play Tuesday in an attempt to get the veteran reps at the position prior to Opening Day. The move comes as a means of helping Castro develop additional positional flexibility in the case that manager Dave Martinez decides to look elsewhere with presumptive starting third baseman Carter Kieboom (.171/.216/.286) continuing to struggle at the dish during camp. Martinez has gone...