The irony was more than evident Sunday at Madison Square Garden. The Cleveland Cavaliers were a disappointing 19-15 when they acquired guards J.R. Smith and Iman Shumpert from the Knicks, who were embarrassed by the Cavs on Sunday and have the league’s worst record. Additionally, Cleveland acquired former Knicks center Timofey Mozgov from Denver later that week. Since trading for Smith and Shumpert, Cleveland is a robust 17-7, has won 17 of 19 and is now a legitimate threat to represent the