The Rays should also be on the lookout for regression. However, it should be pointed out that the players leading the Rays with RISP are Aranda (hitting .280), Diaz (hitting .306), Chandler (hitting .307), and their fifth best is Junior Camerino.
In other words....their best players are leading that charge. They're out-hitting their averages and should be on alert for regression, but these are good, established players with high batting averages in general. They don't have general regression to look out for in addition to their specific regression with RISP.
Put simply: Kody Clemens, Tristan Gray, Victor Caratini, and Trevor Larnach they are not. (Guys who were driving the early RISP) Not all regression is baked the same way, though the Rays should be on alert for it.
Also, widening the picture out, the Twins have still scored more runs than the Rays despite a lower OPS, batting average, OBP, 60 less stolen bases, and only a slight (.407 to .405) advantage in slugging. Which means it's not only the RISP number it's also just really good luck with sequencing as well. (which I've mentioned other places) The RISP gets the biggest finger point because this group of players just had no chance of maintaining that number.