Report: Astros to Call Up RP Miguel Ullola

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WEST PALM BEACH, FL - MARCH 14: Miguel Ullola #68 of the Houston Astros pitches during the game between the Washington Nationals and the Houston Astros at Cacti Park at the Palm Beaches on Friday, March 14, 2025 in West Palm Beach, Florida. (Photo by Trevor Gallagher/MLB Photos via Getty Images) | MLB Photos via Getty Images

The Houston Astros are calling up pitching prospect Miguel Ullola, according to a report from Chandler Rome of The Athletic.

Ullola, 24, is ranked as the Astros #11 prospect per MLB.com. Ullola was converted to a reliever this season in an effort to help him with his command issues and be someone the team could potentially call up to help the big league club this season.

This season, Ullola is 1-4 with a 5.48 ERA for Triple-A Sugar Land, along with a 1.55 WHIP. In 47.2 IP, he has walked 35 and struck out 64.

Since moving to the bullpen May 30, he has allowed only 3 runs in 10 appearances ( a 3 run HR) over 10 IP. He’s allowed 8 hits, 6 walks, and struck out 16.

Rome believes that Kai-Wei Teng, who admitted to some arm fatigue after today’s game, is a likely candidate to be sent down. Rome asserted that Teng was seen in manager Joe Espada’s office after the game, indicating he may have been getting informed he was being optioned.

The Astros are calling up pitching prospect Miguel Ullola, source tells @TheAthletic

— Chandler Rome (@Chandler_Rome) June 27, 2026

Expect the corresponding move to involve Kai-Wei Teng, who has minor-league options remaining and was seen being brought in to manager Joe Espada’s office after today’s game. https://t.co/yM18eTGOaT

— Chandler Rome (@Chandler_Rome) June 27, 2026

Teng threw a career-high 136.1 innings in 2022, but hasn't thrown more than 86 innings in any season since 2023. After today's outing, he's already thrown 64 innings.

"There is some fatigue," Teng said, "but it's still manageable." https://t.co/yydlEeHRFB

— Chandler Rome (@Chandler_Rome) June 27, 2026

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