Perez was optioned to the Astros' alternate training site Saturday, Chandler Rome of the Houston Chronicle reports.
Perez allowed one run on three hits and one walk while striking out two over 1.1 innings Friday, and he'll return to alternate camp following the outing. The southpaw pitched effectively with the Astros during his time with the club and could return to the major-league bullpen at some point in 2020.