The Pirates optioned Valdez to Triple-A Indianapolis on Thursday.
Valdez appeared in five games for the Pirates during his first career stint in the majors, going 2-for-16 with a pair of homers, five total RBI and nine strikeouts. Pittsburgh presumably wasn't satisfied with the 22-year-old's poor strikeout rate, so he'll return to Triple-A while the team brings up utility man Tyler Callihan to fill the open spot on the bench.