Celtics' NBA Playoff Win Teaches Sixers A lot About Where They Need To Go From Here. My Question Is....Is LeBron James One Of The Missing Pieces We Need For Contention? http://www.philly.com/philly/sports/sixers/sixers-celtics-76ers-nba-playoffs-score-recap-offseason-ben-simmons-joel-embiid-20180509.html