Racing PositionsSeries preview: Mets vs. Nats9YAdam RubinDarvish won't start opener, to see specialist9YRichard DurrettNats agree with Snyder on minor league deal9YAngels add Snyder to mix for backup catcher10YOlivo tops Mets' free-agent catcher list10YAdam RubinShoppach highly unlikely to return10YAdam Rubin