"Rockies closer Huston Street suffered a setback with his injured right shoulder on Tuesday, creating a strong possibility that he will open the season on the disabled list.

Street said that he will undergo an MRI today to try and get a better understanding of what caused the shoulder tightness that is identical to what shut him down nearly three weeks ago.

"It's really frustrating - opening day is definitely in jeopardy," Street said this morning. "It would be the first time in six years I would not be ready to go."

Street, who signed a three-year. $22.5 million deal during the offseason, was caught off guard Tuesday by the stiffness in his shoulder, especially because his simulated game on Monday went so well. But when he played catch Tuesday, shoulder became tight again, causing the Rockies to shut him down."