Some of the rebounding is from hustle, but a lot of it is that our guards are getting beat forcing the bigs to help. If they are trying to block the shot, there is nobody else to rebound since we only play one guy over 6'4" at a time.
Good thing the Zips are shooting incredibly well, because this is pathetic otherwise. Not boxing out, not pressuring shooters, throwing the ball away, I'm sure Groce is dumbstruck.