Urquidy was optioned to Triple-A Round Rock on Wednesday, Chandler Rome of the Houston Chronicle reports.
Urquidy struggled in two shorts starts in his first taste of big-league action, allowing seven runs on 14 hits in just six innings of work, though his 8:1 K:BB does at least provide some cause for optimism. The Astros will need a starter for Thursday's game against the Rangers, with Framber Valdez looking likely to get the call.