8:33pm: Rodon experienced shoulder soreness, the team announced. He also reported pain in the neck area, James Fegan of The Athletic tweets.

8:16pm: White Sox starter Carlos Rodon left his start today after just two innings. The lefty’s fastball velocity dropped precipitously in his second frame, as MLB.com’s Adam McCalvy observes on Twitter.

It’s too soon to tell what caused the velo drop, but the South Siders obviously were concerned enough to give a quick hook after just 26 pitches. Rodon allowed three hits and one earned run before departing.

Rodon, 27, already turned in one rough outing to open the season. He had been hoping for a full campaign after missing significant time due to Tommy John surgery. Rodon can be controlled through arbitration for one more season after the 2020 campaign.

That TJ procedure and an earlier shoulder surgery provide a worrisome backdrop to the developments this evening. There are obviously quite a few other potential explanations for a sudden loss of arm speed, but that recent history suggests some added cause for concern.

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