The Arizona Fall League is considered to be the premier league of winter ball. Teams send some of their top prospects there to get extra work in after the MiLB season is over. Over the past decade the Astros have sent top prospects such as George Springer, Francis Martes, Yordan Alvarez, Kyle Tucker, Framber Valdez, Abraham Toro, and Forrest Whitley.
This season the Astros sent seven prospects to play in the Arizona Fall League. Here is an update on how they are performing: