Santos will be sidelined for four weeks after sustaining a fracture in his non-throwing hand, Shawn McFarland of The Dallas Morning News reports.
Santos was hit by a comebacker earlier this week, and he'll be sidelined for roughly a month. The 23-year-old appeared in just six games last season, making five starts at Double-A Frisco and one start at Triple-A Round Rock. He allowed 13 earned runs across 17.1 innings.