Pittsburgh Pirates Left-Handed Pitching Prospect Makes History at Double-A Altoona

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This upcoming week marks one calendar year since the Pittsburgh Pirates called up right-hander Paul Skenes, who went on to win National League Rookie of the Year honors.
Another right-hander, Bubba Chandler, is knocking on the door of the majors. He’s dominating Triple-A hitters, currently 2-0 with a 1.42 ERA at Indianapolis. In 25.1 innings over six games, he has struck out 36 batters.
Two more highly ranked right-handers – Thomas Harrington (MLB Pipeline No. 75 overall, No. 3 Pirates) and Braxton Ashcraft (No. 6 Pirates) – are on the Indianapolis roster.
And joining them is Nick Barco, the team’s No. 7 overall prospect, promoted on Saturday, according to Pittsburgh Post-Gazette beat writer Noah Hiles.
Source: Hunter Barco has just been promoted to Triple-A Indianapolis
— Noah Hiles (@_NoahHiles) May 3, 2025
He doesn’t have the name recognition of Skenes and Chandler, for sure, but he has put his name in the record books of the Double-A Altoona Curve.
Against the Akron RubberDucks on Saturday, Barco threw five scoreless innings, surrendering two hits, walking three and striking out four. He didn’t figure into the decision of the 5-3 loss.
He set a team record, however, by logging another scoreless outing, moving to 25.2 consecutive innings without giving up a run. His season totals at Altoona: 1-0, 0.00 ERA in six starts. He has struck out 34, and batters are hitting .131 against him.
Hunter Barco hasn’t allowed a single run this season.
— Young Bucs (@YoungBucsPIT) May 4, 2025
His 25.2 scoreless inning streak is now the longest in @AltoonaCurve history 👏 pic.twitter.com/PTwK67drsJ
The Pirates selected Barco in the second round of the 2022 MLB Draft after his college career at Florida. In two seasons in the Pittsburgh organization, he is 5-4 with a 2.54 ERA over 33 games (30 starts) and 110 innings.
The arms race now is on in Indianapolis.
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Jami Leabow is the managing editor of Minor League Baseball on SI. Her love for the game began when her parents bought season tickets to the then-California Angels.