Nationals to promote Nate Karns to start Tuesday

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The Nationals will call up prospect right-hander Nate Karns to start Tuesday against the Orioles, reports Mark Zuckerman of CSNWashington.com. He’ll fill the rotation spot of Ross Detwiler, who has been dealing with a right oblique strain for well over a week and was finally placed on the disabled list yesterday.

Karns only has nine starts above the High-A level, so facing the powerful Orioles’ lineup will be a big test, but the Nationals are willing to roll the dice with him rather than give another start to Zach Duke. Meanwhile, Chris Young has really struggled at Triple-A and Ross Ohlendorf just pitched for the Chiefs on Saturday and would be on short rest for the assignment.

Shoulder problems caused Karns to drop to the 12th round back in 2009, but he owns a 2.70 ERA and 262 strikeouts over 216 1/3 innings in the minors. After being named the Nationals’ minor league pitcher of the year in 2012, the 25-year-old owns a 4.60 ERA and 55/18 K/BB ratio in 45 innings across nine starts in Double-A this season. While he has averaged 4.1 BB/9 in the minors, he has shown improved control as he has worked his way up the organizational ladder.

Report: Nationals to call up prospect Carter Kieboom

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Jesse Dougherty of the Washington Post reports that the Nationals will promote middle infield prospect Carter Kieboom to the majors ahead of Friday’s game against the Padres. The Nationals are currently dealing with injuries to shortstop Trea Turner and third baseman Anthony Rendon, so the club hopes Kieboom can help the team tread water at the very least.

Kieboom, 21, was selected by the Nationals in the first round (28th overall) in the 2016 draft. MLB Pipeline currently rates him No. 2 in the Nationals’ system and No. 37 overall. Kieboom has played both second base and shortstop this season after exclusively playing shortstop previously in his professional career.

With Triple-A Fresno to start the 2019 season, Kieboom hit .379/.506/.636 with three homers, 18 RBI, and 14 runs scored in 83 plate appearances.