An undrafted point guard who played 11 games last year in Germany, Brown was instrumental in Sacramento holding on to its fourth-quarter lead. Brown scored 12 points in the quarter, including two 3-pointers.
Spencer Hawes had 21 points and seven rebounds for the Kings (1-1), while John Salmons had 16 points and Kevin Martin and Francisco Garcia both had eight. Shelden Williams added seven points and 11 rebounds.
Jeff Green led Oklahoma City, formerly the Seattle SuperSonics, with 19 points, including eight in the fourth quarter when the Thunder pulled within one point. Damien Wilkins had 14 points, Desmond Mason scored 10 and Johan Petro added eight points and 10 rebounds.
Looking like a team with something to prove following a poor effort earlier in the week in their preseason opener, the Kings scored the game's first points and never trailed in defeating the Thunder (0-2).
It was Hawes, a second-year post player, who had the biggest impact in helping the Kings build a 55-39 halftime lead. Scoring on several smooth inside moves and hitting from the perimeter as well, Hawes had 16 points and five rebounds in 13 first-half minutes.
With the Kings sputtering on offense, the Thunder outscored Sacramento 25-14 in the third quarter to pull within 69-64.
Playing without veteran starters Brad Miller and Kevin Martin, the Kings shot 29 percent in a humbling a 110-81 loss to Portland on Tuesday.
Oklahoma City gave Kevin Durant, last year's NBA's rookie of the year, the night off. He is expected to play Saturday night when Oklahoma City travels to Golden State.