Warren (0-2) took the loss against the Rockies on Saturday, allowing six runs (five earned) on seven hits and one walk with six strikeouts over three innings.
Warren allowed runs in all three frames, including a four-run third. He generated 11 swinging strikes on 76 pitches but has now surrendered four earned runs or more in three of his four major-league outings. The rookie owns an unsightly 9.68 ERA, 1.81 WHIP and 23:6 K:BB across 17.2 innings with the Yankees and tentatively lines up to face the Cardinals at home next week.