Astros Make Roster Change Ahead of Tigers Finale

The move has paid off. The Astros' No. 11 prospect has shown improved command while his fastball has reached a career-high 97.3 mph, giving him a weapon that profiles well at the big-league level.

He reinforced his case for a promotion with consecutive scoreless relief appearances for Sugar Land, including a three-strikeout inning June 24. The Astros clearly saw enough to pull the trigger on his promotion rather than waiting any longer.

Teng's demotion comes one day after he allowed four earned runs over 3 2/3 innings against Detroit before acknowledging afterward that he had been dealing with arm fatigue.

The Astros opted to send him to Triple-A rather than place him on the injured list, preserving roster flexibility while allowing him time to recover. It was the sensible move given the circumstances, and Ullola was ready and waiting to fill the void.

With the bullpen covering significant innings following Teng's abbreviated start Saturday, adding a fresh arm with legitimate swing-and-miss potential provides valuable depth behind Brown and helps reduce the workload on the club's late-inning relievers.

The Astros enter Sunday's finale looking to secure another series victory before returning home for a six-game homestand against the Minnesota Twins and Tampa Bay Rays, making bullpen health a priority.

For Ullola, the promotion represents an opportunity to establish himself in Houston's bullpen after successfully adapting to his new role in the minors.

A strong showing Sunday could strengthen his case for a permanent roster spot as the Astros push through the second half of the season, and given the trajectory he has been on, that opportunity feels well earned.