Hudson's X-rays came back negative after he exited Thursday night's game against the Pirates due to right elbow soreness, Jeff Jones of the Belleville News-Democrat reports.
Hudson has received good news so far, though he'll likely be re-evaluated within the next few days to determine his status moving forward. His absence would be a big blow to the Cardinals, as he owns a 2.77 ERA and 1.00 WHIP with 31 strikeouts over 37 frames so far this year.