Hi Special_Puppy -- that's pretty impressive from Caruso! He's still in the middle of his career without older seasons to pull him down (is this plain RAPM, and not age-adjusted or anything like that?) and this is a career-RAPM rather than a peak RAPM (this could just be saying he's more consistent, rather than actually being better than peak Jrue/Smart/etc.)... but even still he's over Duncan, Ben Wallace, old Robinson, and old Alonso Mourning.
Among top career perimeter defenders, it looks like this career RAPM value goes: Caruso -5.3, Tony Allen -4, Paul George -3.7, Luc Mbah a Moute -3.6 (though he's more of a power forward), Metta World Peace / Ron Artest -3.3, Iguodala -3.3, Immanuel Quickley -3.3, Andre Roberson -3.3, Bruce Brown -3.2. Caruso (and Tony Allen a decade ago) are not just over a lot of the best centers, but they're also over the best wings too.
Just a few more stats I've found:
Alex Caruso
Jrue Holiday:
Marcus Smart:
So it looks like pure impact metrics do generally go Caruso > Jrue > Smart. Smart does surpass recent Jrue in more accurate all in one stats like EPM (although I don't have EPM for younger Jrue).
Two questions for you or others:
1. Do you think Caruso's doing anything specific better than the others? Is it better point of attack defense or better perimeter disruption, in an era where that's really valued? Something else?
Or is it something about his role / situation / fit that's helping him seem more impactful? Defensive stats can be less accurate than offensive ones, in part because team defense relies a lot more on subtle positioning/communication/cohesion factors, which can be both harder to measure (in e.g. box stats) and harder to properly credit who in the lineup is responsible for the value (in e.g. plus minus stats). So it could be Caruso's role/situation is more favorable to his impact metrics, although I'm not sure.
2. Do you have concerns about Caruso's lower minute/possession rate? All these stats are per 100 possessions, but Caruso plays fewer possessions per game than the others. Caruso peaked at ~26 minutes per game in the 23/24 RS, while Jrue was hitting ~35 in the 19/20 RS (and still ~33 in 21/22), while Smart was hitting around ~32 in the 22/23 RS. That might help close the impact gap when you adjust the stats from per 100 possessions to per game, but it also raises the question of whether Caruso's motor would be able to sustain the higher impact defense if he played longer. He did up his minutes in the 20–22 playoffs, but unfortunately he hasn't made the playoffs during his defensive peak in the past two seasons.
Thoughts?