LEXINGTON, Ohio – Teenagers Harry Gottsacker of San Antonio, Tex., and Parker Chase of New Braunsels, Tex., paced GTS practice Friday at Mid-Ohio Sports Car Course as part of the Pirelli World Challenge Grand Prix of Mid-Ohio presented by Honda Racing.

Gottsacker, in the No. 69 Performance Motorsports Group Ginetta GT55, set the quickest GTs time Friday morning with a clocking of 1:28.307 for an average speed of 92.05 miles per hour on his 18th birthday, with Chase, in the No. 19 Performance Motorsports Group Ginetta GT55, second at 1.28.596 (91.75 m.p.h.) in the opening round of practice. In addition, Gottsacker recently received the Eagle Scout Award.

Third in GT practice went to last year’s GTS Mid-Ohior ace winner Lawson Aschenbach of Palms Beach Gardens, Fla., in the No. 10 Blackdog Speed Shop Chevrolet Camaro at 1:28.729 (91.61 m.p.h.) followed by veteran Jeff Courtney of Milwaukee, Wis., in the No. 99 RecStuff.com/KENDA/JCR Motorsports Maserati GT4 at 1:28.804 (91.53 m.p.h.) and Martin Barkey of Hunstville, Ont., Canada at 1:28.899 (91.43 m.p.h.) in the No. 80 Mantella Autosports KTM X-Bow GT4.

Leading the GTS Am category Friday in practice was Mark Klenin of Lone Tree, Colo., in the No. 62 KPR/Tender Belly McLaren 570S at 1:29.078 (91.25 m.p.h.).

Qualifying for the GTS division over the 2.258-mile, 13-turn Mid-Ohio circuit is scheduled for 4:35 p.m. EDT Friday.