Amador is slashing .138/.312/.149 with zero home runs, 12 steals and more walks (19) than strikeouts (17) in 25 games for Double-A Hartford.
The Rockies optioned Amador to Double-A Hartford on Friday, Patrick Saunders of The Denver Post reports.
The Rockies selected Amador to their 40-man roster Tuesday.
Amador (hand) was assigned to Double-A Hartford on Saturday after being activated from High-A Spokane's 7-day injured list.
Amador got a little dinged up during spring training and will be held back in extended before being assigned to High-A Spokane, Jonathan Mayo of MLB.com reports.