Ever since Monday's announcement that he needs a kidney transplant and had to retire because of it, people across the nation have expressed their interest in donating one to Alonzo Mourning.

"From Texas, California, Seattle, Florida, Detroit and parts of New England, people have been calling to say: `How do I get tested? I'd like to help,' " Gregory Perrin, the director of marketing and development for the Kidney and Urology Foundation of America, said yesterday. "A number of them are saying: `I'm a Zo fan. I love the way he played basketball.' Some are actually saying: `I'm a Knicks fan, but I admire what he did in going public with this. I'd like to help.' "