Gay went to Louisville, the Wildcats’ rival, and had a piece of paper with “Louisville Rules” written on it taped to his back during warmups on Sunday. He made sure Calipari saw it.

MORE: It’s time Steelers-Bengals rivalry grew up 

“I never lost to Kentucky,” said Gay. “I play football.”

MORE: Must-see images from NFL training camp 

Calipari retorted that perhaps Gay’s Cardinals lost to Memphis, where Calipari coached from 2000-09 (they did, in Gay’s freshman season of 2003, by a 37-7 count).

Calipari grew up in Moon Township, Pa. In this year’s trip to training camp, according to ESPN, he brought along two former Wildcats player with him — Suns guard Devin Booker and undrafted center Alex Poythress.