The Colorado Rockies made their draft selections in July. But not all those players made their professional debuts with minor league affiliates. For many of those players, they end up in instructional league in Arizona, which happens shortly after the Arizona Complex League season ends.
The right-hander was acquired from the Brewers in the Nick Mears trade in 2024 Herrera just turned 21 a few months ago, but he has been a professional for five years, having been signed in August 2019 out of Venezuela by the Brewers for only a $10k bonus.