I was just scrolling through some of the old NBA drafts on wikipedia, and kept noticing how many good players went undrafted. So here's my top all-undrafted team of active players:

C: B. Miller, B. Wallace
PF:U. Haslem, R. Evans
SF:B. Bowen, A. Nocioni
SG:M. Daniels, R. Bell, D. Jones
PG: M. James, E. Boykins

They wouldn't score a whole lot. But still, with a bit of practice I bet they'd beat the Knicks.