Schunk will start at third base and bat ninth in Thursday's game against the Nationals.
The utility player will enter the lineup as a replacement at the hot corner for the lefty-hitting Ryan McMahon, who is getting the afternoon off while the Rockies face off against Nationals lefty Patrick Corbin. Since getting called up from Triple-A Albuquerque on June 28, Schunk has made just 13 starts and is slashing .174/.224/.239 over 49 plate appearances.