ESPN has a solid opener to its doubleheader as the Boston Celtics host the Dallas Mavericks. But the nightcap should be an alley-oop fest and Wednesday’s best game as the Miami Heat, fresh off their loss to Golden State Warriors in which LeBron James disappeared in the fourth quarter (sound familiar?) visit the Los Angeles Clippers. The game features no less than six players from Team USA’s preliminary roster as LeBron James, Dwyane Wade, Chris Bosh, Blake Griffin, Chris Paul and