Apparently this was a prank, but a odd one (Calipari and Francesa were in on it in advance)
On Wednesday, Francesa had a rare bout of college hoops talk, which led to some discussion on John Calipari's coaching ability after Cal made an appearance on the show. That prompted "John from Kentucky" to call in soon thereafter, once Francesa made it clear that he didn't admire the Kentucky coach's ability to scheme the game. The ensuing two-minute squabble was vintage chest-puffing from both men, each plenty envied and hated in their own profession.
OK, first off, Calipari's radio-caller voice is something to behold. But after that initial weirdness, the two of them get into it. Which makes for a good listen; these guys go way back, after all. "How sensitive are you? You call me up?" Francesa asks Calipari at the outset. "You know what you're like? You're like a caller who doesn't listen, OK?" Francesa reiterates what he told a caller: that he likes Calipari as a coach in essentially every facet except X-and-O acumen. CALIPARI: "That's basically saying I can't coach. You know what they call me? The Magician. Cal, the Magician."
FRANCESA: "Waitaseckint. Are there better X's and O's guys than you?" CALIPARI: "You think I believe that?" FRANCESA: "Yes." CALIPARI: "I will pass a lie detector test and say, 'No.'" FRANCESA: "No you won't. No you won't." And less than 10 seconds after that, the Sports Pope goes vintage Pope and just cuts off Calipari's call and ends it before the Kentucky icon can even get in another word or say goodbye. Treating him just like he called it: as if Calipari was a typical caller from the Bronx or thereabouts. Harsh. Unnecessary. Hilarious.