The Colorado Rockies fear that Rafael Betancourt may have suffered a serious elbow injury.
Betancourt will undergo an MRI on Monday. The fear is that he tore a ligament and will be done for the season.
If the 38-year-old suffered a torn UCL, his career may be over as well.
"It's not good. It's very sore right now. I have gone through a lot of pain throughout my whole career, but this is completely different," Betancourt said after Thursday's loss. "I could not throw another pitch."