T-Mobile Center in Kansas City, Missouri will host UFC Fight Night 257 April 26. The event is headlined by a light heavyweight clash between former champion  Jamahal Hill and former title challenger  Kalil Rountree Jr .,the fight promotion announced on Wednesday.   Hill (12-3, 1 NC) is coming off back-to-back loses for the first time in his career. He was knocked out by champion  Alex Pereira at UFC 300 and was stopped by former titleholder  Jiri Prochazka in his last outing at UFC 311 in January. He’s ranked No.