The Cleveland Cavaliers faced a serious challenge to get back into the win column Wednesday at the Dallas Mavericks with LeBron James out for rest. Luckily for the Cavs, Kyrie Irving made up for that absence with plenty of star power. He even covered for his own key mistake late in the fourth quarter. Play Tourney Pick'em | Fill out your bracket | Print it | Celebrity Challenge Irving led the Cavs offense most of the night and was instrumental in building a 88-71 lead entering the final nine minutes. However, the Mavericks dominated the remainder of the period and looked to have the momentum after Dirk Nowitzki cut it to 97-95 on a lay-up with 1:10 left. The Cavs had a chance to make it a two-possession game in the closing 20 seconds, but Irving fired this pass out of bounds under pressure: He took responsibility for that error by forcing the game-saving turnover the very next play. The Mavericks effectively created a mismatch with Irving guarding Nowitzki on a post-up that would seem to have led to a straightforward turnaround jumper. But Kyrie beat Dirk to Devin Harris's pass, grabbed his lone steal of the night, and took a foul for the chance to ice it at the line: Irving...