We’ve covered catchers, infielders, outfielders, and the plucky rotation. If this series was inexplicably the only contact you’d had with the 2020 Mariners, you might think this club shocked the world and broke their playoff draught in the middle of their rebuild. But you, my diabolical friend, have not met the Mariners bullpen yet, and I envy you for it. Not only was the Mariners bullpen the worst unit in baseball in 2020, by several measures it was among the worst relief cores in MLB history. As a unit, they accrued -1.