The text message from his assistant coach Rex Kalamian popped up on Doc Rivers’s phone on an off night last week, but it contained no pressing strategic suggestions for the Los Angeles Clippers’ next game. No injury updates or juicy trade rumors, either.

Kalamian simply felt an urgency to let Rivers know that it had happened again — another burst of the scoreboard overload that has dominated this 2018-19 N.B.A. season even more than the star-laden Golden State Warriors.

A laughing Rivers recounted how Kalamian’s summary pointed out that nearly every winner that night (Jan. 14) scored 131 to 149 points. “It was like five teams up there,” Rivers said.

In truth it was only four — Indiana (131), Atlanta (142), Golden State (142) and Philadelphia (149) — but Rivers’s point was made. A leaguewide push by teams to shoot more 3-pointers and take more shots earlier in the shot clock than ever before, combined with a freedom-of-movement crusade driven by the league office, has resulted in an offensive boom rendering scores in the 140s routine — with few signs of it abating.