Sullivan will start at catcher and bat seventh in Sunday's game against the Guardians.
Sullivan has handled a hefty workload of late, starting behind the dish in all but two of the Rockies' 10 games since Aug. 12 while All-Star backstop Hunter Goodman (shoulder) has been out of commission. Though Sullivan has popped two home runs, driven in seven runs and scored five times during that span, his fantasy utility will likely take a hit during the upcoming week, when the Rockies will leave the favorable confines of Coors Field and play seven straight road games.