Developed by Aaron Fearne, "tagging up" is a defensive transition system in which all 5 attackers offensive rebound on a shot, matching up (tagging up) with the player who is boxing them out (their defender).
Attackers aggressively move to tag up on the high side of their defender, in good position to convert on a defensive rebound (ball-you-basket or check-you-basket). Do not run past or run under your defender (do not fight for inside position), keep your tag in front of you.
Tagging up creates 50-50 rebounding opportunities and increases offensive rebounding percentage (adding extra possessions), but the priority is being in correct position on a defensive rebound, not offensive rebounding.
Peter Lonergan -
Tagging Up - tag up on the high shoulder (middle), create a rebounding scrum in the paint
- there are going to be mismatches, but those are not very damaging in defensive transition, and you can figure them out on the fly if needed (switch).
Brent Tipton - attackers eat the space to get on the high side of their defender
Aaron Fearne -
Tagging Up - to create room on the high side of your defender, take one or two steps towards the baseline.