In the last 25 years, only 4 of the 50 teams that participated in the NBA Finals had a negative rebounding margin. The Magic rebound margin is currently at -0.1 per game.
However, two of those four teams were the two time winning Houston Rockets.
Magic are currently 6th best at defensive rebounding thanks to Howard, but 29th at offensive rebounding thanks to all the 3 point shots.
Two things could help here. Pietrus was brought in to produce rebounds from the 2 position (10 rebounds in his second return from injury this year). Or a trade.