According to Dustin Long from NBC Sports, in addition to running on NBC, Peacock will stream Cup Series playoff races at Texas, Martinsville and Phoenix.
Prior to the race, Peacock will stream pre-race coverage and after the race will have post-race coverage.
Oct. 17 – Texas
Oct. 31 – Martinsville
Nov. 7 – Phoenix
Pre- and post-race coverage also will be streamed on Peacock
Again, this is IN ADDITION to what will be on air.
— Dustin Long (@dustinlong) October 7, 2021