March 27-31, 2025: NL West

Pictured: Ben Casparius (RHP, LA)

The players covered in his column are only those who still have rookie status as determined by MLB, and who made the Opening Day roster or were called up during the first weekend on an NL West team. Find previous Call-up profiles on the Content tab of the player's PlayerLink page.

 

Arizona Diamondbacks

No eligible rookie callups to date.

 

Colorado Rockies

Seth Halvorsen (RHP, COL)
The Rockies don’t appear to have named a full-time closer and it is certainly possible that the 25-year-old will get opportunities to finish games. Halvorsen was a 7th round selection in 2023 and zoomed to the majors in 2024 after a solid campaign between Double-A and Triple-A. In fact, he was significantly better with the big...

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