One spectacular late-game layup in a week wasn't enough for rookie Kyrie Irving. So, the cool-as-ice kid dropped in another. Irving made a driving layup in traffic with 15.8 seconds left -- one similar to the shot he made last Sunday in Boston -- to give the Cleveland Cavaliers a 91-88 win Saturday night over the Dallas Mavericks, who were unable to stop the 19-year-old sensation when it mattered most.