Yu Darvish remains sidelined with stiffness in his neck, and the Rangers don't know when he'll pitch again. Darvish, who was scratched from Monday's start against the Royals, went through a workout on Tuesday but the results were inconclusive.

The Rangers are off on Wednesday. Darvish is scheduled to throw in the bullpen on Thursday and if that goes well, he could pitch against the Reds on Saturday. Otherwise, the Rangers could pitch him in a Minor League game at some point this week.

Darvish's setback could delay the Rangers' plans for setting their rotation to start the season. Right now, Darvish is slotted as the Rangers No. 2 starter behind Matt Harrison and would make his first start against the Astros on April 2.

Derek Lowe replaced Darvish on Monday and pitched three scoreless innings against the Royals. His next start will be Thursday against the Angels. Harrison was scheduled to start that day, but he'll likely pitch in a Minor League game instead. The Rangers face the Angels in the first week of the season and Harrison is certain to pitch in that series.