Uhm I remember playing Reach the first day it came out until Halo 4 came out, so why aren’t my records for playing it showing up on here? My Halo 3 records are there, so where are my Reach records?
If you mean the stats on waypoint; detailed stats are no longer kept for reach. That was announced a few months ago.
If you mean in-game there is a thread for that here.