Buescher battled door-to-door to the checkered flag to hold on for the team's third top-15 of the year with a 13th-place finish at his home track of Texas Motor Speedway.
The young talent showed the Cup regulars he's ready for big time Nationwide racing.
Trevor Bayne is now tied with Regan Smith for the NASCAR Nationwide Series points lead.
After some successful adjustments on pit road, the Roush Fenway Racing driver was able to crack the top-15 by lap 72.
Ty Dillon currently leads the Richard Childress Racing drivers in the Nationwide Series driver point standings in third, only six points out of first. Brendan Gaughan sits sixth and Brian Scott seventh.
The team were fighting for top-10 finish.
Win at home for Larson.
Two Camry drivers are currently in the top-10 in the NNS unofficial point standings – Sadler (fifth) and Buescher (ninth).
Ty Dillon currently leads the Richard Childress Racing drivers in the Nationwide Series driver point standings in third. Brendan Gaughan sits sixth and Brian Scott seventh.
The Roush Fenway Racing driver wound up two laps down but was able to get caught up to speed towards the end.
Ryan Reed ran in the top-15 for most of the Drive to Stop Diabetes 300 presented by Lilly Diabetes.
James Buescher and the RAB Racing No. 99 Rheem team battled a loose-handling race car.
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Bayne spent most of the later laps hovering close to a top-five finish until rain forced NASCAR to wave the red flag on lap 168.
Elliott Sadler finished the day in the sixth position, and moved within six points of the lead for the Nationwide Series driver championship points.
With this finish, Buescher would tie his career best finish of 12th at PIR in a NASCAR Nationwide Series car.