Allow me to expound a little.
Here are 30 of the greatest bigs of the modern era (normally I count it as 1980 onward, but I pushed the boundary a tad to pick up some late 70s figures like Moses, Walton and Parrish, just be aware that their rebounding numbers may be slightly inflated due to pace at the time), all at Age 23 (or 24 in the case of Admiral (who did not enter the league until he was 24) and Amare (who missed almost his entire Age 23 season).
We could also name this list "Boogie's Peers", except the lesser lights on this list aren't really his peers. His numbers belong in the top group, the HOF group. LaMarcus Aldridge, Shawn Kemp, Brad Daugherty and even that yabbering Big Redhead need not apply.