Teheran (shoulder) was shut down from throwing after showing a drop in velocity and will be reevaluated, Jason Beck of MLB.com reports.

Teheran threw a live bullpen session Saturday but will now have his rehab program halted due to a dip in velocity. The 30-year-old was already looking at a potential return in mid-to-late September, so any shutdown of more than a few days may end his prospects of pitching again this season.

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