The Twins are down to eight relievers competing for seven spots. Perdomo was sent to the minors. Wood pitched well and then came up down with a "strained rotator cuff".
That leaves 8 candidates still in camp and Robertson just got lit up badly in his last outing. He may or may not get a chance to redeem himself. If not, the bullpen competition appears almost over unless one of the guys losing the competition for the rotation bumps somebody.