Newgarden was leading a Team Penske 1-2-3 ahead of team-mates Scott McLaughlin and Will Power in the build-up to the last pit stop.
As the laps trickled down, Newgarden also began catching back marker Nolan Siegel, who was called to drive the #78 Juncos Hollinger Racing Chevrolet while regular Agustin Canapino took a leave of absence following a controversial last week.
