Might be considered a somewhat 'out there', but it is what it is. Before I introduce this stat situation, I'll provide a snap-shot of the fault-line in the history of scoring in the NFL...
Between 1970-79 on MNF
- 52 losing teams (38.2% of all losing teams) totaled 9 pts or less
- 59 games (43.4% of all games) totaled 39 pts or more
Between 1980-89 on MNF
- 32 losing teams (20.9% of all losing teams) totaled 9 pts or less
- 90 games (58.8% of all games) totaled 39 pts or more
Once the 1980's rolled around (1980 being just the 3rd year in which the 16-game regular season had been in existence), the league saw a significant increase in scoring (which the snapshot of MNF stats above accurately evinces), thus it's fair to say that decade marks the beginning of the modern era of the NFL. So, with that established -
In the history of the modern era of the NFL (36 completed seasons), there has never been a season before now in which the MNF time-slot saw 7 games come & go without featuring a game in which a losing team put up a team total between 17-31 pts. The 7 MNF losers so far this season have put up scores of 16, 0, 14, 32, 10, 14 & 3 pts.
To put this 17-31 pt loser scoring range in some sort of context: 42.8% of all losers from the other primetime games (TNF & SNF) this season have put up scores within this range & 49.0% of all losers from all non-MNF games played so far this season have put up scores within this range.
The picture painted from all of the above is rather clear: this is a highly unusual 'drought' to be taking place. The most obvious option this relates to for the coming game is the Texans TT: lined @14.5, this drought ending precludes the under option cashing. With the full game total lined 40.5 there's slightly more scope for the under to come in, but only at the very lowest end of the loser's score range (17-19 pts). The Texans have conceded plenty in their 2 losses (27 & 31 pts) while the Broncos have conceded at least 17 pts in 3 of their 4 wins (the only exception vs. a non-conference opponent).
Just food for thought, take it fwiw.