Dallas Mavericks forward Harrison Barnes poked fun at Dirk Nowitzki over the Slam Dunk Competition. Barnes, a Slam Dunk participant in 2014, said the only way Nowitzki could win the high-flying event is on NBA 2K. The 40-year-old veteran Nowitzki has recently made fun of his own mobility and aging game. On Twitter, Nowitzki tweeted, […]