Arkansas athletic director Hunter Yurachek had jokes for the Razorbacks fans on hand as John Calipari was introduced Wednesday. Having just taken Calipari from Kentucky, Yurachek made a reference to the Wildcats. “Y’all know we’re not playing Kentucky tonight, right?” he quipped. Calipari spent the past 15 seasons in Lexington and led the Wildcats to 12 NCAA Tournament appearances, four Final Fours and one championship. He’ll hope to find the same success in Fayetteville as he takes over a Razorbacks team coming off of a 16-17 finish in 2023-24. Arkansas has formally announced Calipari as thei…