Dallas Mavericks forward Dirk Nowitzki tries to stop Los Angeles Lakers center Tarik Black from driving inside during the first half of an NBA basketball game, Sunday, Jan. 22, 2017, in Dallas. Los Angeles Lakers guard Jose Calderon looks to pass as Dallas Mavericks forward Harrison Barnes and Dallas Mavericks guard Seth Curry defend during the first half of an NBA basketball game, Sunday, Jan. 22, 2017, in Dallas.