Rockies Promote Eiberson Castellano to MLB, Make Key Roster Changes

The Colorado Rockies made headlines today with a flurry of roster moves, prominently featuring the promotion of right-handed pitcher Eiberson Castellano from Triple-A Albuquerque. This marks a significant milestone for the 25-year-old, who is set to make his Major League debut, adding to the excitement of the Rockies’ season as he becomes the eighth player to debut for the franchise this year.

Hints of Castellano’s impending promotion surfaced last weekend when Paul DePodesta, the Rockies’ president of baseball operations, praised the young pitcher. “Eiberson Castellano made his first start last night in Triple-A. He had done really, really well in Double-A, had a terrific start last night, went six shutout in his first Triple-A game,” DePodesta noted, underscoring Castellano’s readiness for the big leagues.

Castellano earned accolades last week as the Pacific Coast League Pitcher of the Week after delivering a stellar performance against the Salt Lake Bees, where he pitched six scoreless innings, allowing just one hit and two walks while striking out seven. His impressive outing highlighted his ability to dominate on the mound and hinted at the potential he brings to the Rockies.

Before his promotion to Albuquerque, Castellano showcased his skills with Double-A Hartford, compiling a 4-2 record with a 2.72 ERA over 10 starts. His performance placed him among the elite in the Eastern League, where he boasted the second-lowest ERA. Originally hailing from Maracaibo, Venezuela, Castellano signed a Minor League contract with the Rockies on December 5, 2025, after spending five seasons in the Philadelphia Phillies organization. In 109 career Minor League appearances, including 48 starts, he has accumulated a 21-16 record with a 3.78 ERA, striking out 390 batters over 333.1 innings.

In addition to Castellano’s promotion, the Rockies also optioned right-handed pitcher Jeff Criswell back to Albuquerque. Criswell is in the recovery phase after undergoing Tommy John surgery, and has yet to allow a run in two innings pitched this season. Finally, right-handed pitcher Valente Bellozo has cleared waivers and accepted an outright assignment to Triple-A, marking another shift in the Rockies’ roster dynamics.

Note: This recap is an independently written summary based on publicly available reporting.