Mikolas is slated to follow an opener Wednesday in Cleveland, Spencer Nusbaum of The Athletic reports.
PJ Poulin will open the game for the Nationals before Mikolas handles the bulk of the workload. Mikolas has collected a 3.74 ERA and 1.11 WHIP in five bulk relief outings this season, as compared to an 8.28 ERA and 1.64 WHIP in six traditional starts.