In March of this season, O/U is 34-56 (37.8%) for teams playing their 4th game in 6 nights.

There are 3 different ways to play 4 in 6 and the strongest under bias is:

game, rest, game, game, rest, game today

For that pattern, O/U is 9-23 (28.1%) and was 13-26 (33.3%) last season.

3 teams qualify in that regard today

Hornets (vs Spurs) 220
Kings (at Mavericks) no line yet with Doncic questionable
Pistons (at Nuggets) 211.5

Nuggets are also playing their 4th in 6 but in a different pattern (game, game, rest, game, rest, game today)

The trend obviously makes some sense because you expect tired legs towards the end of the season and less equipped to deal with the tough scheduling.

I like the Pistons one the most since both teams are on 4 in 6 though that's a really low number. Kings could be ok depending on number. They look like they're running out of steam, they played 3 straight unders and by a lot. Hornets looks less appealing since they're playing their young guys more and last 2 games have gone comfortably over.