Triolo will start at third base and bat eighth in Sunday's game against the Diamondbacks.
Triolo will stay in the Pittsburgh lineup for the sixth time in seven games, but he'll likely occupy a utility role for the club moving forward after Isiah Kiner-Falefa (knee) returned from the injured list Saturday to make his Pirates debut. Kiner-Falefa is expected to serve as the Pirates' primary option at second base, where Triolo had previously made five consecutive starts before hitting the bench Saturday. Triolo will be back in the starting nine Sunday as the Pirates give regular third baseman Ke'Bryan Hayes a breather.