Whitley (lat) was placed on the 7-day disabled list Tuesday, Chandler Rome of the Houston Chronicle reports.
Whitley was scratched from his scheduled start over the weekend due to the lat issue, and the Astros opted to send him to the disabled list after he showed little improvement. The Astros figure to proceed cautiously with the top prospect seeing as he only recently returned from a month-long stay on the DL due to an oblique injury. The young righty is still planning to pitch somewhere during the fall.