Singleton is out of the lineup for Sunday's game against the Diamondbacks.
Singleton had started at first base in both of the Astros' previous two matchups with right-handed pitchers, but he'll give way to Victor Caratini while righty Ryne Nelson takes the hill for Arizona in the series finale. With an OPS of .694 since the All-Star break, Singleton hasn't done enough to fully solidify a strong-side platoon role, though he's still likely to see the majority of the starts at first base down the stretch.