Because 2 of the recruits came with him from Memphis, and Wall was by his own admission going to go to Memphis due to Cal already recruiting him.
And 2 other elite recruits were already committed to UK and stayed with em.
It was a great job by Calipari, but its not like he started from scratch here.
Just goes to show how friggin dumb LOIs are for the player, as LOIs give the school all the power. Players almost always now commit to the coaching staff, not the school...yet the school gets to hold em hostage if they sign the LOI.
Just another part of the broken system that is College Basketball recruiting.