Oberg (arm) underwent surgery for thoracic outlet syndrome Tuesday to help alleviate blood clots, Nick Groke of The Athletic reports.

Oberg missed the start of the season due to a lower-back strain, and he later dealt with blood clots in his right arm. As a result of his injuries, the right-hander missed the entire 2020 season. The Rockies hope that Oberg's procedure will allow him to pitch again in the future, but the team won't know his status until several weeks or months after he recovers.

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