John Calipari is mourning the loss of college hoops legend Reggie Warford -- the first Black basketball player to graduate from the University of Kentucky -- after he died on Thursday morning.
Cal called the former hooper his "brother" in an emotional tweet ... and added, "I know how much Reggie meant to Kentucky & how he inspired others."
"Reggie and I worked together at Pitt in the 80s and have remained friends," the Wildcats head coach said. "I'm going to miss my brother, may God bless you Reggie.