Thaddeus Young added 18 points and 12 rebounds for the Sixers, who had lost 13 of their previous 16 games overall coming into the contest.
James Harden supplied 29 points, nine rebounds and six assists for the Rockets, who committed 17 turnovers in losing their third consecutive game.
Chandler Parsons donated 23 points in the loss.
Millions of Getty images now available for free via embed tool
Boston schools pull out free condoms over wrapping complaints