LAS VEGAS -- It was the first NASCAR Xfinity Series trophy of the season for A.J. Allmendinger, but the timing was on point, his playoff win in the Ambetter Health 302 at Las Vegas Motor Speedway on Saturday punching his ticket into next month's season-finale championship race.

The 42-year old Californian held off a hard-charging Ryan Sieg by a mere .156-second to claim his 18th career win -- leading a race-best 102 of the 201 laps in his No. 16 Kaulig Racing Chevrolet. Allmendinger had to out-run and out-negotiate Sieg in the closing laps, ultimately getting the best of the field on a final restart at the 1.5-miler with two laps remaining.

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