Pfaff Motorsports has announced that Sandy Mitchell will replace Marco Mapelli at next week's Sahlen's Six Hours of the Glen.

Another busy weekend of racing is upon us, starting with the IMSA Chevrolet Detroit Sports Car Classic.

In contrast to the utter dominance of IMSA's premier GTP class by Porsche Penske Motorsport, the GTD PRO category has a fairly close title race going.

The first time Jack Hawksworth encountered the streets of downtown Detroit on a racing simulator, he resisted the urge to go as fast as possible.“I tried to treat it like the real thing,” Hawksworth said. “Obviously, if you go out there and start clipping walls and just sending it, it...