For the Mariners to be successful in 2019, they need to have a quality bullpen. Their starting rotation has suffered through injuries, regression, and other evils that baseball brings this year. The way the Oakland Athletics were able to mask their below-average, injury-plagued rotation all the way to a Wild Card appearance last year was by building an elite bullpen.
To this point, Seattle’s bullpen has failed to hold its own. Remove Roenis Elías, Brandon Brennan, and Connor Sadzeck from the equation, and the bullpen unit drops to a league-worst -1.7 fWAR.