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Colorado Rockies: The top 25 players under 25 years old

By Jake Shapiro

DENVER, CO - AUGUST 28: Starting pitcher Antonio Senzatela #49 of the Colorado Rockies delivers to home plate during the first inning of an interleague game against the Detroit Tigers at Coors Field on August 28, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images)
DENVER, CO - AUGUST 28: Starting pitcher Antonio Senzatela #49 of the Colorado Rockies delivers to home plate during the first inning of an interleague game against the Detroit Tigers at Coors Field on August 28, 2017 in Denver, Colorado. (Photo by Justin Edmonds/Getty Images) /
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DENVER – JUNE 30: General view of Coors Field front entrance as the Arizona Diamondbacks play the Colorado Rockies in the National League game at Coors Field on June 30, 2003 in Denver, Colorado. The Diamondbacks defeated the Rockies 8-7 in 12 innings. (Photo by Brian Bahr/Getty Images)
DENVER – JUNE 30: General view of Coors Field front entrance as the Arizona Diamondbacks play the Colorado Rockies in the National League game at Coors Field on June 30, 2003 in Denver, Colorado. The Diamondbacks defeated the Rockies 8-7 in 12 innings. (Photo by Brian Bahr/Getty Images) /

15 Ryan Castellani

A second-round pick who hurls from the right side who spent his age 21 season at Double-A despite being three years younger than the league. Wait, we just wrote about Lambert. OK, so Lambert and Castellani are on the same track and Castellani is just a year older.

Last year the 6-foot-4, 220-pounder, started 27 games to the tune of a 4.89 ERA in 157.1 innings. Castellani put together the same BB/9 (2.7) and K/9 (7.6) rates as he did in 2016 at High-A. He had a 3.99 FIP, which means he may have run into some bad luck.

He will start at Double-A in 2018 albeit could very much earn a mid-season promotion. His mid-90s fastball, polished mechanics and youth could very well have him as big league starter before age 23. More likely, he needs to work on consistency and him and Lambert get lumped together in the same prospect group, which is by no means a bad thing. Castellani and Lambert are two young arms that would be the talk of the town if the other young arms weren’t on this list.

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