Complex sentence: He had previously led UMass in 1996 and Memphis in 2008 to the Final Four, but those appearances were later vacated; however, Calipari himself was not personally implicated by the NCAA in the Memphis case.
Split into simpler sentences: He had previously led UMass in 1996 and Memphis in 2008 to the Final Four, but those appearances were later vacated. However, Calipari himself was not personally implicated by the NCAA in the Memphis case.