the flex is to move to Saturday
In Week 16, three of five possible matchups currently listed as TBD will be scheduled for Saturday on NFL Network: Houston at Tampa Bay, Buffalo at New England, Detroit at Denver, Oakland at the Los Angeles Chargers and San Francisco at the Los Angeles Rams. Start times and Saturday games for Week 16 will be announced no later than following Week 8, with the non-Saturday games to be played on Sunday.