Penske Entertainment has split with Indy NXT director Richard Buck.RACER has learned the former NASCAR executive, who was announced on December 10 as the leader of IndyCar’s development series, was released ahead of this weekend’s Indy NXT season debut in St. Petersburg. The timing of the change gives Penske Entertainment...

Three months after Levi Jones left his post as Penske Entertainment’s Indy NXT director, the company has found his replacement by reaching back to one of its CART IndyCar Series crew chiefs.Richard Buck, who helmed Penske Racing cars for Rick Mears, Emerson Fittipaldi, Danny Sullivan, and others before moving onto...

NASCAR has named Richard Buck, a NASCAR executive with a wealth of diverse experience in motorsports, as NASCAR Sprint Cup Series managing director. Buck will serve in the role held the past 12 years by John Darby, who will remain at NASCAR as managing director, competition. Buck and NASCAR's two...