Both sides struggled to carve out any clear-cut chances in the opening 45 minutes due to a lack of quality in the final third of the pitch.
However, just two minutes after the break Kansas City took the lead through Dominic Dwyer in a move he started as his pass played in Sal Zizzo down the left.
The midfielder's cross found the 23-year-old in the box and he curled the ball into the bottom corner.
Sporting were handed a chance to retake the lead when Igor Juliao was brought down in the area by Doneil Henry and the referee awarded a spot kick. Dwyer took the penalty and fired the ball past Joe Bendik into the bottom corner.
Kansas City were minutes away from securing the three points, but they failed to clear their lines from a free kick and Orr was there to head home Nick Hagglund's lofted ball into the area into the net to claim a point for his side.