The Boston Red Sox have optioned Rusney Castillo and Jackie Bradley Jr. to Triple-A Pawtucket, clearing the way for Mookie Betts to be the opening-day starter in center field. With a glut of outfielders in spring training, the Red Sox pared down the group Thursday. They will begin the regular season with Hanley Ramirez in left field, Betts in center and Shane Victorino in right. More...