Here's a couple of nice articles from hornets.com.
http://www.nba.com/hornets/news/qanda_23july2007.html
In this one he explains why he chose the number 9.
http://www.nba.com/hornets/news/blog365.html#23july2007
I’m no numerologist, but Mo Pete says that 9 “stands for rebirth and a new beginning. If you look it up, it also means assertive and strong-willed, which I think describes me.”
“(The selection of jersey No. 9) was meant for both New Orleans and myself. This is the first year the team is back (full-time) in New Orleans. This is a chance to do some great things, both for my career and for this city.”