For the past two months, José Alvarado has been the very best reliever in the National League as the Phillies chase a postseason berth. José Alvarado has been phenomenal for the Philadelphia Phillies as of late. If you’ve been keeping up with Inside the Phillies, that shouldn’t come as too much of a surprise. We’ve already talked about him as, perhaps, the best reliever in the Phillies bullpen. We’ve considered that he might, in fact, be the best left-handed reliever in baseball. And as Alvarado continues to impress, it might be time to go another step further: is the 27-year-old…