The Astros selected Ullola's contract from Triple-A Sugar Land on Tuesday.
The move adds Ullola to the 40-man roster and protects him from next month's Rule 5 Draft. Ullola spent the entirety of the 2025 campaign at Sugar Land, finishing with a 3.88 ERA and 131:78 K:BB over 113.2 innings. The 23-year-old will compete for an Opening Day roster spot, but a career 15.6 percent walk rate in the minors suggests more seasoning is needed.
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Astros' Miguel Ullola: Healthy at Triple-A
Rotowire
Ullola has a 2.08 ERA, 0.69 WHIP and 5:1 K:BB in 4.1 innings through two starts for Triple-A Sugar Land.
Ullola was removed from his Spring Breakout appearance in mid-March with right shoulder discomfort. He made his first start for the Space Cowboys April 8 and stayed on turn for an April 13 start, although he is slowly building back up from a workload standpoint.
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Astros' Miguel Ullola: Dealing with sore shoulder
Rotowire
Ullola was removed from Friday's Spring Breakout game appearance versus the Nationals due to right shoulder discomfort, Chandler Rome of The Athletic reports.
Any type of shoulder injury is worrisome, but it's unclear at this point how much time Ullola might miss. The 22-year-old finished last season at Triple-A Sugar Land and, once healthy, will head back there to begin the 2025 campaign.
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Astros' Miguel Ullola: Exits appearance with injury
Rotowire
Ullola was removed from Friday's Spring Breakout game appearance versus the Nationals with an apparent injury, Chandler Rome of The Athletic reports.
Ullola was in his second inning of work when he was visited by a trainer following a strikeout, eventually walking off the mound. The Astros have yet to provide any concrete information about the right-hander's condition.
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Astros' Miguel Ullola: Strong summer at Double-A
Rotowire
Ullola has a 3.88 ERA, 1.12 WHIP, and a 67:29 K:BB in 58 innings over his last 12 outings for Double-A Corpus Christi.
The hard-throwing righty has a 4.49 ERA for the year, but he's been more consistent since the calendar turned to June. Ullola's 13.5 percent walk rate on the year is his best mark to date, so he still needs to improve his control to make it as a starter at the highest level, but things are trending up. He sits at a career-high 106.1 innings on the season, which is another key datapoint for the 22-year-old. He will likely be added to the 40-man roster this offseason to protect him from the Rule 5 draft.
