Kansas City put the game out of reach on a free kick in the 86th minute.
Louisville is now in an NWSL playoff position with five regular season games left.
Racing delivered a complete performance to rout the Red Stars and get into an NWSL playoff position.
The defender has never missed a match for Racing Louisville FC and will now try to lead it to the playoffs.
Louisville's general manager in Ryan Dell and head coach in Bev Yanez spoke to reporters Tuesday about the bombshell trade.
But after leading 1-0 at halftime, Racing fell on the road to the North Carolina Courage 3-1.
LouCity, who's now 11-2-1, will next travel to Tampa Bay on Saturday, June 15.
Racing Louisville FC dropped a second straight match, but still advances to the NWSL Challenge Cup semifinals.
Racing Louisville FC's five-match unbeaten streak across all competitions ends on the road against the Courage.
Washington Spirit defeated Racing Louisville 3-0 on Saturday night, ending the NWSL expansion club's hopes of reaching the postseason.