As I created my early 2021 Relief Pitcher rankings, I realized how wide open so many bullpens are right now due to free agency. But there is at least one team that can sleep well knowing the back end of their bullpen is solid as bedrock and that's the Tampa Bay Rays. Diego Castillo and Nick Anderson are one of the most lethal relief pitcher-duos in the land and happen to be my favorite.Prior to 2020, I was imploring the masses to avoid the Nick Anderson hype-train and instead snag Diego Castillo...