NASCAR has updated the playoff standings following the first stage of the FireKeepers Casino 400 at Michigan International Speedway. Bubba Wallace has moved up in the standings from 15th to 14th, and Ross Chastain is now in the playoffs as he moved to 15th (previously 17th). Below are the full standings. Since the FireKeepers Casino 400 waspostponed until Monday, there will be more changes to the standings. However, the drivers who are in the top 12 are locked into the postseason since they have won at least one Cup Series race. Here’s a look at the current playoff standings. Wallace finished …