The Grizzlies turned the game in their favor with a dominating third quarter that saw them outscore the Kings, 35-18.
The score was tied, 52-52 early in the frame, before Memphis went on a 9-0 run to take control. Another eight-point spurt, sparked by Young's back-to-back layups, pushed the margin to 87-64 later in the stanza.
The hosts held an 87-68 cushion entering the fourth and were never seriously threatened in the final 12 minutes.
Memphis scored 11 straight points at the tail end of the first quarter and headed to the second holding a 31-17 lead.
The Kings slowly chipped away by hitting 12-of-18 from the floor in the second stanza. They pulled even at 50-all on Isaiah Thomas' two free throws with 16.1 seconds remaining, though Gay's tip-in beat the halftime buzzer.
The Grizzlies played without All-Star forward Zach Randolph, who is out indefinitely with a bruised right knee suffered in the loss to Chicago... DeMarcus Cousins, who reportedly demanded a trade from the Kings, did not start but played 22 1/2 minutes, scored four points and grabbed right rebounds...J.J. Hickson logged 12 points and 10 rebounds for Sacramento...Tony Allen rounded out Memphis' double-digit scorers with 10 points.