guga31bb
commented
2 years ago Yeah these are retractable roof stadiums where "open/closed" hasn't been filled in. Tagging @leesharpe since he knows more about this.
I recommend just replacing any NAs with "retractable" or something like this; this is how nflfastR works
roof field appears to be null for a handful of games
a few examples... 2021_03_CAR_HOU 2021_05_NE_HOU 2021_12_TB_IND 2021_12_NYJ_HOU
Looks like it could be stadium specific