people in the Business and Politics of Motorsports, as selected by long-time journalist/publicist and industry insider Michael Knight.
1. Dale Earnhardt Jr. -- Concussion KOs him for the rest of the season, and while Junior says he plans to return in 2017, the NASCAR industry and Hendrick Motorsports are forced to ponder what to do if their most popular driver can't make a comeback.
2. Tony and Don Schumacher -- NHRA Top Fuel's winningest driver wins his record 10th U.S. Nationals while father and team owner doubles at Indy with Matt Hagen taking the Funny Car
5. John Hunter Nemechek and Mike Helton -- The driver set a dangerous new precedent by pinning Cole Custer against a wall to win the Truck series race in Canada. Upon review at NASCAR's weekly competition meeting, will the sanction's vice chairman let this stand?
7. Will Power -- After observation for concussion-like symptoms after Watkins Glen, will the only driver left who can beat Simon Pagenaud for the IndyCar championshp be able to participate in Thursday's test session at Sonoma, site of the season's final race?
8. Nico Rosberg -- Italian Grand Prix victory pulls him closer to Mercedes' teammate Lewis Hamilton in world title standings.
9. David Gravel -- Sweeps the World of Outlaws' doubleheader at Skagit Speedway.
10. Chris Windom -- Daring outside-line line pass of Jeff Swindell with three laps to go earns him first career USAC Silver Crown dirt win in Ted Horn 100 at DuQuoin State Fairgrounds.