The Mariners bullpen is good. Particularly against mediocre competition. However, against the best of the best, IE playoff teams, they are a unit in desperate need of help. Manager Scott Servais has done a poor job of putting his pen in a position to succeed.
But Servais is unlikely to just get magically better (or competent) at bullpen management. If this is the case, then GM Jerry Dipoto has only 1 choice: he needs to give his team a bullpen that is idiot proof.
He already has made strides in this direction, adding Alex Colome a month ago.