Maybe I should be more specific.
Since 1946, there have been 1434 Seasons by NBA Centers who have played as many minutes as Ryan Hollins. Of those seasons, only 14 times has a Center managed to post a worse Rebound Rate then Ryan Hollins' 9.2...
Since Ryan Hollins was entered into the starting line-up, he has averaged about 24 minutes/game. Of the 14 centers ahead of Ryan Hollins on the list, only 3 played more minutes/game than Ryan Hollins is currently playing.
So there you have it. If you want to know why our rebounding has been so atrocious recently, look no further then the epically bad rebounder we're currently starting at Center.It's that simple.
Here is the basketball-reference link.
In other news, Kevin Love's Rebound Rate of 21.6 is currently good for the 19th best season by any forward that has played 1000 minutes. That's 19th best out of 3554!!