Cristian Cásseres Jr., fresh off a contract extension with the club, assisted and later scored the match winner, converting a penalty for the 2-1 victory.
Tom Barlow was able to draw the penalty, along the touchline, as he and a Sporting Kansas City defender battled for the ball.
Cásseres Jr. also assisted Florian Valot earlier in the second half, dishing in a service off a corner kick, which Valot buried in the back of the net.
The Red Bulls did give up a goal, seconds after the Valot opener, for Kansas City to draw even.
Ryan Meara, who started the match, was forced out of the game due to an apparent injury.