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Pair of Rockies pitching prospects working on commanding new pitches in the Arizona Fall League

Konner Eaton (No. 28 PuRP) and Fidel Ulloa are very different pitching prospects. For starters, Eaton is a left-handed starter, having been drafted in the sixth round of the 2024 MLB Draft out of George Mason University in Fairfax, Virginia.…

By Samantha Bradfield · Purple Row

Published: Monday, 2 November 2026 at 3:00 PM

Key Things to Know

Rockies pitching prospects Konner Eaton and Fidel Ulloa are developing and commanding new pitches in the Arizona Fall League.
Ulloa has thrown 7.1 scoreless innings across seven appearances while working on his new kick changeup.
Eaton has surrendered just two unearned runs in nine innings while expanding his pitching mix to six offerings.

The Story in 60 Seconds

Colorado Rockies pitching prospects Konner Eaton and Fidel Ulloa are focusing on commanding expanded pitch arsenals during their successful stints in the Arizona Fall League. Working alongside Salt River Rafters pitching coach Jerry Sullivan, both 2024 draft picks have excelled over the opening three weeks while integrating new weapons into their repertoires.

Left-handed starter Eaton has yielded two unearned runs across nine innings after expanding his arsenal to six pitches. Right-handed reliever Ulloa has delivered 7.1 scoreless frames across seven outings, prominently developing a new kick changeup to complement his swing-and-miss slider and fastball.

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Pair of Rockies pitching prospects working on commanding new pitches in the Arizona Fall League

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