With Grant Hill getting 17 points and eight rebounds in his first game in a Phoenix uniform, the Suns were off and running from the start, outscoring the Kings 29-18 in the first quarter and led the rest of the way.
Hill, who signed as a free agent in the offseason, appeared to have no problem adjusting to the Suns' uptempo pace, taking 11 first-half shots and scoring 13 points to help the Suns to a 55-46 lead.
Both Kevin Martin and Quincy Douby scored 17 points for the Kings (1-1). Mike Bibby had 10 points and led Sacramento with seven rebounds.
The Kings had trouble stopping the Suns and were also unsuccessful at the free-throw line, converting 13 of 23 attempts.
Disgruntled in the offseason and in trade rumors for much of the summer, Marion looked as motivated as any Suns player, making 7 of 10 shots and adding four assists and two blocks.
Leandro Barbosa scored 14 points and Sean Marks added 13 points and nine rebounds for Phoenix, which made 13 of 26 3-point shots. Raja Bell and Marcus Banks both scored 13 points and Boris Diaw had 10.
Seemingly content to look for teammates all game instead of shoot, Steve Nash had 11 assists and scored three points off only three shots.
Amare Stoudemire, Phoenix's leading scorer last season, recently had arthroscopic knee surgery and watched the game in street clothes.